Medals identification

Hello, 

I need to identify these medals, probably from China? I found them in an old coin collection, they looks like gold plated.

Weight is variable but diameter is the same:

1 - 15.7g

2 - 15.3g

3 - 19.4g

diameter - 35.0mm

Souvenirs medal, great persons in the People's Republic of  China series.

Obverse is Liu Shaoqi, Mao Zedong, and Zhu De; the reverse is Tiananmen.