Zong and Cheng represent China at World Cup of Darts
The Chinese spots were divided by two qualifying tournaments. Zong secured a third appearance on the World Cup of Darts after winning the qualifier on Saturday as he beat Li Quansheng 5-1 in the final.
He will be joined by debutant Cheng, who defeated Di Zhuang 5-2 in the final on Sunday. The two winners also played a final against each other as prize money was available for the winner and runner-up. Zong saw off Cheng 6-5 as he reeled off five legs on the spin after being 1-5 down.