Exhibit 99.1


Joint Filing Agreement


Pursuant to Rule 13d-1(k)(l) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13G is being filed on behalf of each of the undersigned.


June 21, 2019   Zheng Hui Investments Limited
  By: /s/ Qian (Eugene) Hu
June 21, 2019   Qian (Eugene) Hu
    /s/ Qian (Eugene) Hu