The Yau international Mathcamp (formerly known as the Yau Tsinghua Mathcamp) has been organized since 2014 and it achieves great success on nurturing mathematics talented students.
Here are web pages of past Mathcamp.
The registration period of the 2020 Yau International Mathcamp:
10 May - 30 June 2020
Successful applicants will be informed by email on or before 10 July, 2020.