diff --git a/README.md b/README.md
index e0610ff..2cbe76c 100644
--- a/README.md
+++ b/README.md
@@ -6,25 +6,34 @@ Value Change Dump ([VCD](https://en.wikipedia.org/wiki/Value_change_dump)) parse
 
 2. clone https://github.com/Digital-EDA/digital-vcd-parser
 
-## Build
+## 构建
 
 ```bash
 source $EMCC_HOME/emsdk_env.sh
-# once only
+
+# 只需要运行一次
 npm install browserify terser node-gyp -g
-# once only
+# 只需要运行一次
 npm i
+
+# 构建左推解析器代码（每次修改 ./bin/build.js 都需要重新运行）
+node bin/build.js
+
 # build
 make -j 12
 ```
 
-production are :
+生成 :
 
 - `./out/vcd.js`
 - `./out/vcd.wasm`
 
-move them to your development worksapce.
+部署代码：
 
+```bash
+# 将生成的 wasm 通过 浏览器化和特殊处理后部署到 render 项目中
+source deploy.sh /mnt/c/Users/11934/Project/Digital-IDE/digital-vcd-render
+```
 
 ## Test
 
diff --git a/bin/build.js b/bin/build.js
index bf0d7a8..f042ada 100755
--- a/bin/build.js
+++ b/bin/build.js
@@ -125,7 +125,8 @@ const generate = (cb) => {
         $dumpon: 11,
         $dumpvars: 12,
         '#': 13,
-        '0': 14, '1': 15,
+        '0': 14,
+        '1': 15,
         x: 16, X: 17,
         z: 18, Z: 19,
         u: 20, U: 21, // VHDL states
@@ -136,9 +137,12 @@ const generate = (cb) => {
         b: 30, B: 31, r: 32, R: 33
     });
 
+    console.log(cmd);
+
+    // p.code.store('command') 的具体执行逻辑移步 command-handler.js 中的 commandHandler
     declaration
         .match(spaces, declaration)
-        .select(cmd('$scope $var $upscope $comment $date $timescale $version'),
+        .select(cmd('$scope $var $upscope $comment $date $timescale $version #'),
             p.invoke(p.code.store('command'), commandSpan.start(inDeclaration)))
         .select(cmd('$enddefinitions'),
             p.invoke(p.code.store('command'), commandSpan.start(enddefinitions)))
diff --git a/bin/vcd.js b/bin/vcd.js
index 1a67be1..00f49cb 100644
--- a/bin/vcd.js
+++ b/bin/vcd.js
@@ -5,9 +5,13 @@ const createVCD = require('../out/vcd.js');
 const webVcdParser = require('../lib/web-vcd-parser.js');
 
 /**
- * @typedef {{ maxChunkLength: number, useGcd: boolean }} consumeConfig
+ * @typedef {Object} consumeConfig
+ * @property {number} maxChunkLength
+ * @property {boolean} useGcd 
  * 
- * @typedef {{ kind: string, wave: number[] }} vcdValue
+ * @typedef {Object} vcdValue
+ * @property {string} kind
+ * @property {number[]} wave
  * 
  * @typedef {Object} VarSignal
  * @property { 'var' } kind
diff --git a/install.sh b/install.sh
index 0b6d712..4e4a6ba 100644
--- a/install.sh
+++ b/install.sh
@@ -1,3 +1,3 @@
 source $EMCC_HOME/emsdk_env.sh
 npm install browserify terser node-gyp -g
-npm i
\ No newline at end of file
+npm i
diff --git a/lib/command-handler.js b/lib/command-handler.js
index 3502b1a..a53ede4 100644
--- a/lib/command-handler.js
+++ b/lib/command-handler.js
@@ -3,72 +3,79 @@
 /* eslint-disable indent */
 
 const handleScope = (info, str) => {
-  const [type, name] = str.split(/\s+/);
-  const ero = {kind: 'scope', type, name, body: []};
-  const current = info.stack[info.stack.length - 1];
-  current.body.push(ero);
-  info.stack.push(ero);
-  // console.log(ero);
+    const [type, name] = str.split(/\s+/);
+    const ero = { kind: 'scope', type, name, body: [] };
+    const current = info.stack[info.stack.length - 1];
+    current.body.push(ero);
+    info.stack.push(ero);
+    // console.log(ero);
 };
 
 const handleUpScope = (info /* , str */) => {
-  info.stack.pop();
-  // console.log(['upscope', str]);
+    info.stack.pop();
+    // console.log(['upscope', str]);
 };
 
 const handleVar = (info, str) => {
-  // reg 3 ( r_reg [2:0]
-  // 0   1 2 3+
-  const eroj = str.split(/\s+/);
-  const ero = {
-    kind: 'var',
-    type: eroj[0],
-    size: parseInt(eroj[1]),
-    link: eroj[2],
-    name: eroj.slice(3).join('')
-  };
-  {
-    const m = ero.name.match('^(?<name>\\w+)\\[' + (ero.size - 1) + ':0]$');
-    if (m) {
-      ero.name = m.groups.name;
+    // reg 3 ( r_reg [2:0]
+    // 0   1 2 3+
+    const eroj = str.split(/\s+/);
+    const ero = {
+        kind: 'var',
+        type: eroj[0],
+        size: parseInt(eroj[1]),
+        link: eroj[2],
+        name: eroj.slice(3).join('')
+    };
+    {
+        const m = ero.name.match('^(?<name>\\w+)\\[' + (ero.size - 1) + ':0]$');
+        if (m) {
+            ero.name = m.groups.name;
+        }
     }
-  }
-  const current = info.stack[info.stack.length - 1];
-  current.body.push(ero);
-  // console.log(ero);
+    const current = info.stack[info.stack.length - 1];
+    current.body.push(ero);
+    // console.log(ero);
 };
 
+/**
+ * @description 处理 C++ 中的 on_command 函数，也就是 llparse 框架中的 p.code.store('command') 触发的函数
+ * @param {} info 
+ * @param {*} cmd 
+ * @param {*} str 
+ */
 const commandHandler = (info, cmd, str) => {
-  str = str.trim();
-  switch(cmd) {
-  case 1:
-    info.comment = str;
-    // console.log(['comment', str]);
-    break;
-  case 2:
-    info.date = str;
-    // console.log(['date', str]);
-    break;
-  case 3:
-    handleScope(info, str);
-    break;
-  case 4:
-    info.timescale = str;
-    // console.log(['timescale', str]);
-    break;
-  case 5:
-    handleUpScope(info, str);
-    break;
-  case 6:
-    handleVar(info, str);
-    break;
-  case 7:
-    info.version = str;
-    // console.log(['version', str]);
-    break;
-  default:
-    console.log([cmd, str]);
-  }
+    str = str.trim();
+
+    switch (cmd) {
+        case 1:
+            info.comment = str;
+            // console.log(['comment', str]);
+            break;
+        case 2:
+            info.date = str;
+            // console.log(['date', str]);
+            break;
+        case 3:
+            handleScope(info, str);
+            break;
+        case 4:
+            info.timescale = str;
+            // console.log(['timescale', str]);
+            break;
+        case 5:
+            handleUpScope(info, str);
+            break;
+        case 6:
+            handleVar(info, str);
+            break;
+        case 7:
+            info.version = str;
+            // console.log(['version', str]);
+            break;
+        default:
+            console.log([cmd, str]);
+    }
 };
 
 module.exports = commandHandler;
diff --git a/lib/vcd-pipe-deso.js b/lib/vcd-pipe-deso.js
index c2d2abf..db7bc78 100644
--- a/lib/vcd-pipe-deso.js
+++ b/lib/vcd-pipe-deso.js
@@ -86,7 +86,7 @@ module.exports = async (deso, inst, done) => {
   inst.change.any(onAnyChange);
 
   inst.on('finish', () => {
-    console.log((Date.now() - t0) / 1000);
+    // console.log((Date.now() - t0) / 1000);
     deso.tgcd = tgcd;
     deso.t0 = (inst.info.t0 || 0);
     // console.log(inst.getTime());
diff --git a/lib/web-vcd-parser.js b/lib/web-vcd-parser.js
index c23fa4a..d7c5a34 100644
--- a/lib/web-vcd-parser.js
+++ b/lib/web-vcd-parser.js
@@ -145,7 +145,7 @@ const getWrapper = wasm => {
          * @param {*} chunk 
          * @returns 
          */
-        execute: (ctx, cb0, cb1, info, chunk) => {
+        execute: (ctx, cb0, cb1, info, chunk) => {            
             boundInfo = info;
             ee[0] = cb0;
             ee[1] = cb1;
diff --git a/test/debug/basic.js b/test/debug/basic.js
index 52f6b8a..e74c40a 100644
--- a/test/debug/basic.js
+++ b/test/debug/basic.js
@@ -8,12 +8,11 @@ const fs = require('fs');
 const { makeVcdStream } = require('../../bin/vcd');
 
 async function main() {
-    const arraybuffer = fs.readFileSync('./test/debug/pe_tb.vcd');
+    const arraybuffer = fs.readFileSync('./test/debug/small.vcd');
     const vcdstream = await makeVcdStream();
     vcdstream.consume(arraybuffer);
     const info = vcdstream.getBasicInfo();
-    console.log(info.signalValues['*']);
-    console.log(info.signalValues['+']);
+    console.log(info);
 }
 
 main();
\ No newline at end of file
diff --git a/test/debug/la0_waveform.vcd b/test/debug/la0_waveform.vcd
new file mode 100644
index 0000000..2d65221
--- /dev/null
+++ b/test/debug/la0_waveform.vcd
@@ -0,0 +1,114 @@
+#0 $dumpon
+$date today $end
+$timescale 1 ns $end
+$scope module top $end
+$var wire 1 0 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/line1_debounced $end
+$var wire 1 1 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/line2_debounced $end
+$var wire 4 2 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/trigger_line $end
+$var wire 2 3 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_trigger_mode $end
+$var wire 2 4 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_sourceA_sel $end
+$var wire 2 5 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_sourceB_sel $end
+$var wire 1 6 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_counter_rst $end
+$var wire 32 7 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_counter $end
+$var wire 2 8 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_counter_mode $end
+$var wire 1 9 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_trigger_out $end
+$var wire 1 a ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_sourceA $end
+$var wire 1 b ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/encoder_sourceB $end
+$var wire 1 c ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/trigger_forward $end
+$var wire 1 d ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/trigger_backward $end
+$var wire 2 e ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/encoder_sourceA_dly $end
+$var wire 2 f ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/encoder_sourceB_dly $end
+$var wire 1 10 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/encoder_sourceA_pos $end
+$var wire 1 11 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/encoder_sourceA_neg $end
+$var wire 1 12 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/encoder_sourceB_neg $end
+$var wire 1 13 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_forward0 $end
+$var wire 1 14 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_forward1 $end
+$var wire 1 15 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_forward2 $end
+$var wire 1 16 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_forward3 $end
+$var wire 1 17 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_backward0 $end
+$var wire 1 18 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_backward1 $end
+$var wire 1 19 ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_backward3 $end
+$var wire 1 1a ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encoder_control_top_inst/u1_encoder2trigger/trigger_backward2 $end
+$var wire 32 1b ins_top_s4/inst_apb3_device/extern_trigger_top_inst/encode_rcounter $end
+$upscope $end
+$enddefinitions $end
+#0
+$dumpvars
+00
+11
+b1110 2
+b00 3
+b00 4
+b01 5
+06
+b00000000000000000010000111001101 7
+b00 8
+09
+0a
+1b
+0c
+0d
+b00 e
+b11 f
+010
+011
+012
+013
+014
+015
+016
+017
+018
+019
+01a
+b00000000000000000000000000000000 1b
+$end
+#1021
+10
+b1111 2
+#1022
+1a
+#1023
+b01 e
+110
+117
+#1024
+1d
+b11 e
+010
+017
+#1025
+b00000000000000000010000111001110 7
+19
+0d
+#1026
+09
+#2047
+10
+11
+b1111 2
+b00 3
+b00 4
+b01 5
+06
+b00000000000000000010000111001110 7
+b00 8
+09
+1a
+1b
+0c
+0d
+b11 e
+b11 f
+010
+011
+012
+013
+014
+015
+016
+017
+018
+019
+01a
+b00000000000000000000000000000000 1b
diff --git a/vcd_spans.c b/vcd_spans.c
index 9b9f8f4..1d8f833 100644
--- a/vcd_spans.c
+++ b/vcd_spans.c
@@ -77,6 +77,7 @@ int stringEq(const unsigned char* i,  // search pattern
 int commandSpan(vcd_parser_t* state, const unsigned char* p,
                 const unsigned char* endp) {
     const uint8_t command = state->command;
+
 #ifndef VCDWASM
     napi_env env = state->napi_env;
 
@@ -117,7 +118,7 @@ int commandSpan(vcd_parser_t* state, const unsigned char* p,
         return 0;
     }
 #else
-    if ((command > 0) && (command < 8)) {
+    if ((command > 0) && (command < 8)) {        
         const int len = endp - p;
         int tailLen = 3;
         if (len < 4) {
diff --git a/wasm_main.cpp b/wasm_main.cpp
index b859144..61899bc 100644
--- a/wasm_main.cpp
+++ b/wasm_main.cpp
@@ -133,15 +133,17 @@ int init(externalJsMethodZero* f0, externalJsMethodOne* f1,
 int32_t execute(const int context, externalJsMethodZero* f0,
                 externalJsMethodOne* f1, externalJsSetProperty* sfn,
                 externalJsGetProperty* gfn, char* p, const int plen) {
-    // cout << "execute got " << p << "\n";
-    // cout << "execute " << (int)sfn << " and got " << p << "\n";
+    // 详见 web-vcd-parser.js 中的 boundSet
     bound_set_property = sfn;
-    bound_get_property = gfn;
-    externalZero = f0;
-    externalOne = f1;
 
-    // const size_t plen = strlen(p);
-    // printf("<chunk len|%d>\n", plen);
+    // 详见 web-vcd-parser.js 中的 boundGet
+    bound_get_property = gfn;
+
+    // 详见 web-vcd-parser.js 中的 boundEE0
+    externalZero = f0;
+
+    // 详见 web-vcd-parser.js 中的 boundEE1
+    externalOne = f1;
 
     const int32_t error = vcd_parser_execute(state, p, p + plen);