Exhibit 99.1
JOINT FILING AGREEMENT
The undersigned agree that this Schedule 13D, and any amendments hereto, relating to the shares of common stock, par value $0.0001 per share, of Xynomic Pharmaceuticals Holdings, Inc. shall be filed on behalf of the undersigned.
| Date: June 6, 2019 | ||
| Bison Capital Holding Company Limited | ||
| By: | /s/ Peixin Xu | |
| Name: | Peixin Xu | |
| Title: | Director | |
| By: | /s/ Peixin Xu | |
| Name: | Peixin Xu | |
| By: | /s/ Fengyun Jiang | |
| Name: | Fengyun Jiang | |