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: May 30, 2019
| By: | /s/Tingzhi Qian | |
| Name: | Tingzhi Qian | |
| Prosperico Gate I Limited | ||
| By: | /s/ Tingzhi Qian | |
| Name: | Tingzhi Qian | |
| Title: | Director | |
| Dande Lion Limited | ||
| By: | /s/ Tingzhi Qian | |
| Name: | Tingzhi Qian | |
| Title: | Director | |