
Models display creations by graduates of Hong Kong Polytechnic University in Hong Kong, south China, May 17, 2017. This year marks the 20th anniversary of Hong Kong's return to the motherland. (Xinhua/Wang Shen)

Models display creations by graduates of Hong Kong Polytechnic University in Hong Kong, south China, May 17, 2017. This year marks the 20th anniversary of Hong Kong's return to the motherland. (Xinhua/Wang Shen)