The top three are all from China's Hebei province, where the Genting Snow Park, one of the Olympic and Paralympic competition zones, is located.

Zhu said, "It is wonderful to compete on home snow and take medals for our home province."

Fellow Chinese rider Jiang Zihao finished seventh in the small final.

The all-Chinese big final emerged when Ji and Zhu earned a one-two finish in the first semifinal, followed by another one-two by Wang and Zhang in the second semifinal.

The other three Para snowboard cross gold medals up for grabs on Monday went to Cecile Hernandez from France in the women's SB-LL2, Tyler Turner from Canada in the men's SB-LL1, and Finland's Matti Suur-Hamari in the men's SB-LL2.

Chinese rider Wu Zhongwei took bronze in the men's SB-LL1.