2 hour layover enough time?

Hi I am a Canadian flying from Vancouver to Zhengzhou with a 2 hour layover before I take another connecting flight to Chengdu on my way to Australia after Chengdu. Is the 2 hours enough to get from my arriving Vancouver flight, through customs then to my gate for the flight to Chengdu? I will book on the same airline Sichuan Airlines for all three flights. Any help would be great thanks!