English 
| Name | Introduction | Size | Downloads | Update | Download |
|---|---|---|---|---|---|
| Tongda Patent.pdf | 2.73MB | 70 | 2022-08-02 | Download | |
| Tongda Catalogue (CN) 2022.pdf | Tongda Highway Catalogue in Chinese | 7.83MB | 113 | 2022-08-02 | Download |
| Tongda Catalogue (EN) 2022.pdf | 40.07MB | 109 | 2022-08-02 | Download |
