His most successful partnership was with Hong Wei: together they reached the year end tournament BWF Superseries Finals in 2014 and 2015.

As Hong has since retired,[2] Chai's current partner in men's doubles is Wang Zekang.

Due to progressing quickly, he was transported to Hunan Badminton Team for professional training for four years later.

In 2007, he was enter the national badminton team, and at that year in the early of July, he competed at the Asian Junior Championships and won the boys' doubles title.

[4][5] Chai was a bronze medalist at the Asia Championships in the men's doubles event in 2009 and 2012.