# Tool Module
Utility functions: trade calendar, Tushare Pro API.
## Functions
- **tool_trade_date_hist_sina** — 历史交易日历 (from Sina)
- **pro_api** — Tushare Pro API通用接口
```rust
use akshare::AkShareClient;
let client = AkShareClient::new();
let dates = client.tool_trade_date_hist_sina().await?;
```