Liu Yan, also known as Ada Liu, Yang Liu, is a Chinese actress, hostess and singer. She won the "Best New Artist" at the 2nd Top Chinese Music Awards and the "Best Promising Host" at the 3rd Zongyi ...

It was 1982 and Liu Yan, an astronomer at the Purple Mountain Observatory in Nanjing, was at his desk responding to a letter about a mysterious light that had briefly appeared in the night sky over ...