diff --git a/excel/README.md b/excel/README.md
new file mode 100644
index 00000000..22833331
--- /dev/null
+++ b/excel/README.md
@@ -0,0 +1,435 @@
+# Yao Excel Module
+
+A Go module for manipulating Excel files with TypeScript API support.
+
+## IMPORTANT: Always Close Resources
+
+**IMPORTANT**: Always make sure to close Excel file handles using `excel.close` when done to prevent memory leaks and file locking issues. Failing to close handles may cause file corruption or application errors.
+
+## Quick Example
+
+Here's a simple but complete example showing proper resource management:
+
+```typescript
+// Open an Excel file
+const h = Process("excel.open", "data.xlsx", true);
+
+// Perform operations
+const sheets = Process("excel.sheets", h);
+Process("excel.write.cell", h, sheets[0], "A1", "Hello World");
+Process("excel.save", h);
+
+// IMPORTANT: Always close the handle when done
+Process("excel.close", h);
+```
+
+## Usage in TypeScript
+
+You can use the Excel module in TypeScript through the Process API. Below are examples of common operations with return type descriptions.
+
+### Basic Operations
+
+#### Open an Excel file
+
+```typescript
+/**
+ * Opens an Excel file
+ * @param path - Path to the Excel file
+ * @param writable - Whether to open in writable mode (true) or read-only mode (false)
+ * @returns string - Handle ID used for subsequent operations
+ */
+const h: string = Process("excel.open", "file.xlsx", true);
+
+// Open in read-only mode (false parameter or not passed)
+const hRead: string = Process("excel.open", "file.xlsx", false);
+// or simply
+const h2: string = Process("excel.open", "file.xlsx");
+
+// IMPORTANT: Don't forget to close the handle when done
+// Process("excel.close", h);
+```
+
+#### Get all sheets in the workbook
+
+```typescript
+/**
+ * Gets all sheet names in the workbook
+ * @param handle - Handle ID from excel.open
+ * @returns string[] - Array of sheet names
+ */
+const sheets: string[] = Process("excel.sheets", h);
+// Example output: ["Sheet1", "Sheet2"]
+```
+
+#### Close a file
+
+```typescript
+/**
+ * Closes an Excel file
+ * @param handle - Handle ID from excel.open
+ * @returns null
+ */
+Process("excel.close", h);
+```
+
+#### Save changes to file
+
+```typescript
+/**
+ * Saves changes to the Excel file
+ * @param handle - Handle ID from excel.open
+ * @returns null
+ */
+Process("excel.save", h);
+```
+
+### Reading Data
+
+#### Read a cell's value
+
+```typescript
+/**
+ * Reads a cell's value
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param cell - Cell reference (e.g. "A1")
+ * @returns string - Cell value
+ */
+const value: string = Process("excel.read.cell", h, "SheetName", "A1");
+```
+
+#### Read all rows
+
+```typescript
+/**
+ * Reads all rows in a sheet
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @returns string[][] - Two-dimensional array of cell values
+ */
+const rows: string[][] = Process("excel.read.row", h, "SheetName");
+```
+
+#### Read all columns
+
+```typescript
+/**
+ * Reads all columns in a sheet
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @returns string[][] - Two-dimensional array of cell values
+ */
+const columns: string[][] = Process("excel.read.column", h, "SheetName");
+```
+
+### Writing Data
+
+#### Write to a cell
+
+```typescript
+/**
+ * Writes a value to a cell
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param cell - Cell reference (e.g. "A1")
+ * @param value - Value to write (string, number, boolean, etc.)
+ * @returns null
+ */
+Process("excel.write.cell", h, "SheetName", "A1", "Hello World");
+// Can write different types of values
+Process("excel.write.cell", h, "SheetName", "A2", 123.45);
+Process("excel.write.cell", h, "SheetName", "A3", true);
+```
+
+#### Write a row
+
+```typescript
+/**
+ * Writes values to a row starting at the specified cell
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param startCell - Starting cell reference (e.g. "A1")
+ * @param values - Array of values to write
+ * @returns null
+ */
+Process("excel.write.row", h, "SheetName", "A1", ["Cell1", "Cell2", "Cell3"]);
+```
+
+#### Write a column
+
+```typescript
+/**
+ * Writes values to a column starting at the specified cell
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param startCell - Starting cell reference (e.g. "A1")
+ * @param values - Array of values to write
+ * @returns null
+ */
+Process("excel.write.column", h, "SheetName", "A1", ["Row1", "Row2", "Row3"]);
+```
+
+#### Write multiple rows
+
+```typescript
+/**
+ * Writes a two-dimensional array of values starting at the specified cell
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param startCell - Starting cell reference (e.g. "A1")
+ * @param values - Two-dimensional array of values to write
+ * @returns null
+ */
+Process("excel.write.all", h, "SheetName", "A1", [
+  ["Row1Cell1", "Row1Cell2", "Row1Cell3"],
+  ["Row2Cell1", "Row2Cell2", "Row2Cell3"],
+]);
+```
+
+### Formatting and Styling
+
+#### Set cell style
+
+```typescript
+/**
+ * Sets a cell's style
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param cell - Cell reference (e.g. "A1")
+ * @param styleID - Style ID
+ * @returns null
+ */
+Process("excel.set.style", h, "SheetName", "A1", 1);
+```
+
+#### Set row height
+
+```typescript
+/**
+ * Sets a row's height
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param row - Row number
+ * @param height - Height in points
+ * @returns null
+ */
+Process("excel.set.rowheight", h, "SheetName", 1, 30); // Set row 1 to 30 pts height
+```
+
+#### Set column width
+
+```typescript
+/**
+ * Sets column width for a range of columns
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param startCol - Starting column letter
+ * @param endCol - Ending column letter
+ * @param width - Width in points
+ * @returns null
+ */
+Process("excel.set.columnwidth", h, "SheetName", "A", "B", 20);
+```
+
+#### Merge cells
+
+```typescript
+/**
+ * Merges cells in a range
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param startCell - Starting cell reference (e.g. "A1")
+ * @param endCell - Ending cell reference (e.g. "B2")
+ * @returns null
+ */
+Process("excel.set.mergecell", h, "SheetName", "A1", "B2");
+```
+
+#### Unmerge cells
+
+```typescript
+/**
+ * Unmerges previously merged cells
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param startCell - Starting cell reference (e.g. "A1")
+ * @param endCell - Ending cell reference (e.g. "B2")
+ * @returns null
+ */
+Process("excel.set.unmergecell", h, "SheetName", "A1", "B2");
+```
+
+#### Set a formula
+
+```typescript
+/**
+ * Sets a formula in a cell
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param cell - Cell reference (e.g. "C1")
+ * @param formula - Excel formula without the leading equals sign
+ * @returns null
+ */
+Process("excel.set.formula", h, "SheetName", "C1", "SUM(A1:B1)");
+```
+
+#### Add a hyperlink
+
+```typescript
+/**
+ * Adds a hyperlink to a cell
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @param cell - Cell reference (e.g. "A1")
+ * @param url - URL for the hyperlink
+ * @param text - Display text for the hyperlink
+ * @returns null
+ */
+Process(
+  "excel.set.link",
+  h,
+  "SheetName",
+  "A1",
+  "https://example.com",
+  "Visit Example"
+);
+```
+
+### Iterating Through Data
+
+#### Row Iterator
+
+```typescript
+/**
+ * Opens a row iterator
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @returns string - Row iterator ID
+ */
+const rid: string = Process("excel.each.openrow", h, "SheetName");
+
+/**
+ * Gets the next row from the iterator
+ * @param rowID - Row iterator ID from excel.each.openrow
+ * @returns string[] | null - Array of cell values or null if no more rows
+ */
+let row: string[] | null;
+while ((row = Process("excel.each.nextrow", rid)) !== null) {
+  // Process the row
+  console.log(row);
+}
+
+/**
+ * IMPORTANT: Always close the row iterator when done
+ * @param rowID - Row iterator ID from excel.each.openrow
+ * @returns null
+ */
+Process("excel.each.closerow", rid);
+```
+
+#### Column Iterator
+
+```typescript
+/**
+ * Opens a column iterator
+ * @param handle - Handle ID from excel.open
+ * @param sheet - Sheet name
+ * @returns string - Column iterator ID
+ */
+const cid: string = Process("excel.each.opencolumn", h, "SheetName");
+
+/**
+ * Gets the next column from the iterator
+ * @param colID - Column iterator ID from excel.each.opencolumn
+ * @returns string[] | null - Array of cell values or null if no more columns
+ */
+let col: string[] | null;
+while ((col = Process("excel.each.nextcolumn", cid)) !== null) {
+  // Process the column
+  console.log(col);
+}
+
+/**
+ * IMPORTANT: Always close the column iterator when done
+ * @param colID - Column iterator ID from excel.each.opencolumn
+ * @returns null
+ */
+Process("excel.each.closecolumn", cid);
+```
+
+### Utility Functions
+
+#### Convert between column names and indices
+
+```typescript
+/**
+ * Converts a column name to a column number
+ * @param colName - Column name (e.g. "A", "AB")
+ * @returns number - Column number (1-based)
+ */
+const colNum: number = Process("excel.convert.columnnametonumber", "AK"); // Returns 37
+
+/**
+ * Converts a column number to a column name
+ * @param colNum - Column number (1-based)
+ * @returns string - Column name
+ */
+const colName: string = Process("excel.convert.columnnumbertoname", 37); // Returns "AK"
+```
+
+#### Convert between cell references and coordinates
+
+```typescript
+/**
+ * Converts a cell reference to coordinates
+ * @param cell - Cell reference (e.g. "A1")
+ * @returns number[] - Array with [columnNumber, rowNumber] (1-based)
+ */
+const coords: number[] = Process("excel.convert.cellnametocoordinates", "A1"); // Returns [1, 1]
+
+/**
+ * Converts coordinates to a cell reference
+ * @param col - Column number (1-based)
+ * @param row - Row number (1-based)
+ * @returns string - Cell reference
+ */
+const cellName: string = Process("excel.convert.coordinatestocellname", 1, 1); // Returns "A1"
+```
+
+## Complete Workflow Example
+
+```typescript
+// Open Excel file in writable mode
+const h: string = Process("excel.open", "file.xlsx", true);
+
+// Get available sheets
+const sheets: string[] = Process("excel.sheets", h);
+const sheetName: string = sheets[0];
+
+// Read some data
+const value: string = Process("excel.read.cell", h, sheetName, "A1");
+console.log("Cell A1 contains:", value);
+
+// Write data
+Process("excel.write.cell", h, sheetName, "B1", "New Value");
+Process("excel.write.row", h, sheetName, "A2", ["Data1", "Data2", "Data3"]);
+
+// Add a formula
+Process("excel.set.formula", h, sheetName, "D1", "SUM(A1:C1)");
+
+// Format cells
+Process("excel.set.rowheight", h, sheetName, 1, 30);
+Process("excel.set.columnwidth", h, sheetName, "A", "D", 15);
+
+// Save changes
+Process("excel.save", h);
+
+// IMPORTANT: Always close the handle when done
+Process("excel.close", h);
+```
+
+## Notes
+
+- Always make sure to close open file handles using `excel.close` when done to prevent resource leaks and file locking issues.
+- Remember to save changes with `excel.save` before closing to ensure all modifications are persisted.
+- For performance reasons, try to batch operations where possible instead of making many small changes.
diff --git a/excel/process.go b/excel/process.go
index 7360d88c..f6bdf37f 100644
--- a/excel/process.go
+++ b/excel/process.go
@@ -46,16 +46,16 @@ func init() {
 	})
 }
 
-// processOpen process the excel.open <file> <readonly>
+// processOpen process the excel.open <file> <writable>
 func processOpen(process *process.Process) interface{} {
 	process.ValidateArgNums(1)
 	file := process.ArgsString(0)
-	readonly := false
+	writable := false
 	if len(process.Args) > 1 {
-		readonly = process.ArgsBool(1)
+		writable = process.ArgsBool(1)
 	}
 
-	handle, err := Open(file, readonly)
+	handle, err := Open(file, writable)
 	if err != nil {
 		exception.New("excel.open %s error: %s", 500, file, err.Error()).Throw()
 	}