Olympic silver medallist P.V. Sindhu advanced to the semi-finals, while Ajay Jayaram exited in the last eight stage of the China Superseries Premier badminton tournament here on Friday.Seventh seed Sindhu moved past Chinese He Bingjiao 22-20, 21-10 in 39 minutes. The Indian will meet the winner between Japan's Akane Yamaguchi and Sung ji Hyun of South Korea.Jayaram, meanwhile, found it tough against Olympic champion Chen Long of China, who won 21-15, 21-14 in 40 minutes.Long will meet Olympic bronze medallist Viktor Axelsen, who smashed past Japanese Takuma Ueda 21-11, 21-6 in just 30 minutes.