Born in Suzhou in China's Anhui province, Wang had her first successes at provincial level winning a series of events in 2010.

[1] She entered the 800 m at the 2011 World Youth Championships in Athletics and improved through the rounds, reducing her best from 2:07.13 to 2:03.23 by the end of the competition.

In the final she nipped Jessica Judd at the line to take the silver medal behind the favourite Ajeé Wilson.

[3] Chunyu competed exclusively on the national circuit in 2012 and her best run of the season came at the Chinese Athletics Championships, where she was just two hundredths of a second behind Zhao Jing, with a time of 2:01.48 minutes.

[4] At the start of the 2013 outdoor season she placed sixth in the 800 m at the IAAF Diamond League meeting in Shanghai then went on to win her first major title in the form of the 800 m gold medal at the 2013 Asian Athletics Championships.