diff --git a/README.md b/README.md
index abcb91f..92d15bc 100644
--- a/README.md
+++ b/README.md
@@ -191,4 +191,106 @@ println("Hello", 42)  // 输出: Hello42\n
 | 13     | &=     | a &= 1         | a = a & 1              |
 | 13     | ^=     | a ^= 1         | a = a ^ 1              |
 | 13     | <<=    | a <<= 1        | a = a << 1             |
-| 13     | >>=    | a >>= 1        | a = a >> 1             |
\ No newline at end of file
+| 13     | >>=    | a >>= 1        | a = a >> 1             |
+
+## 2. 实现细节
+
+### 2.1 词法分析的符号表结构
+#### 关键字表
+
+| name    | id   |
+| ------- | ---- |
+| var     | 1    |
+| i8      | 2    |
+| i16     | 3    |
+| i32     | 4    |
+| i64     | 5    |
+| u8      | 6    |
+| u16     | 7    |
+| u32     | 8    |
+| u64     | 9    |
+| float32 | 10   |
+| float64 | 11   |
+| char    | 12   |
+| for     | 13   |
+| if      | 14   |
+| else    | 15   |
+| bool    | 16   |
+| string  | 17   |
+| vector  | 18   |
+| array   | 19   |
+| struct  | 20   |
+| tuple   | 21   |
+| print   | 22   |
+| println | 23   |
+|         |      |
+|         |      |
+|         |      |
+
+#### 界符表
+
+| id | 关键字 |
+| ------ | ------ |
+| 1      | -      |
+| 2      | ！     |
+| 3      | ~      |
+| 4      | /      |
+| 5      | *      |
+| 6      | %      |
+| 7      | +      |
+| 8      | -      |
+| 9      | <<     |
+| 10      | >>     |
+| 11      | >      |
+| 12      | >=     |
+| 13      | <      |
+| 14      | <=     |
+| 15      | ==     |
+| 16      | !=     |
+| 17      | &      |
+| 18      | ^      |
+| 19     | \|     |
+| 20     | &&     |
+| 21     | \|\|   |
+| 22     | =      |
+| 23     | %=     |
+| 24     | \*=     |
+| 25     | /=     |
+| 26     | +=     |
+| 27     | -=     |
+| 28     | \|=    |
+| 29     | &=     |
+| 30     | ^=     |
+| 31     | <<=    |
+| 32     | >>=    |
+| 33 | ( |
+| 34 | ) |
+| 35 | < |
+| 36 | > |
+| 37 | , |
+| 38 | . |
+| 39 | [ |
+| 40 | ] |
+| 41 | ? |
+| 42 | : |
+
+#### 常量表
+
+| id   | type | val  |
+| ---- | ---- | ---- |
+| 1    | i8   | 33   |
+| 2    | i64  | 100  |
+| 3   | char   | 指向'c'的pointer  |
+| 4   | string  | 指向'hello,world'的pointer |
+
+#### 标识符表
+
+| id   | name |
+| ---- | ----|
+| 1    | a |
+| 2    | tot |
+| 3   | my_vector |
+| 4   | ans |
+
+
+