 Complete the following phrase:  His first season of international competition came in 2010 and with his best jump of the year 2.23 metres he took the silver medal at the 2010 Asian Junior Athletics Championships, finishing behind Mutaz Essa Barshim. He was runner-up to Huang Haiqiang at the Chinese Athletics Championships that year. He was undefeated on the Asian Athletics Grand Prix circuit in 2011 and placed eighth at the 