Lang Zheng (R) of Beijing Guo'an celebrates his goal in the game on Friday, March 8, 2013. [Photo: Xinhua]

Beijing Guoan scored three times in the first half and an own goal after the break from SIPG's Wang Jiajie helped them wrap up a 4-1 win at home Friday.

Lang Zheng, Joffre Guerron and Wang Xiaolong scored for Guoan in the first half with SIPG attacking midfielder Wu Lei grabbing the visitors' goal after some fine footwork in the box.

Wang headed a Guoan's cross from the right into his own net in the 79th minute.

Guoan took second spot on the CSL standings ahead of Sainty, while Qingdao Jonoon are fourth after Bruno Meneghel's second-half injury time goal gave them a 2-1 win away to Guizhou Renhe.

Reigning champions Guangzhou Evergrande, with a 5-1 thumping of Shanghai Shenxin, moved straight to the top of the CSL on goal difference.