Hong Kong set for 7th day of gains, China shares slip
* HSI +0.8 pct, H-shares +0.4 pct, CSI300 -0.5 pct
* PetroChina up, banking and real estate slip
* Hong Kong property jumps, Cheung Kong at 7-year high (Updates to midday)
HONG KONG, July 30 (Reuters) - Hong Kong's benchmark index climbed on Wednesday, heading for a seventh day of gains on the back of a bullish property sector, while China stocks took a breather after recent strength.
China's major indexes broke a long-running streak as early gains led by index heavyweight PetroChina Co Ltd were offset by plunging real estate and banking shares.
By midday, the Shanghai Composite Index was down 0.1 percent at 2,180.39 points, breaking a six-day winning streak, the longest since August 2013.
The CSI300 of the leading Shanghai and Shenzhen A-share listings fell 0.5 percent.
PetroChina was among top index boosts in Shanghai, climbing more than 6 percent at one point. The government said on Tuesday it had launched a corruption investigation into former domestic security chief Zhou Yongkang, who served as CNPC's general manager from 1996-1998.
PetroChina shares had previously slid on rumours that Zhou would be investigated; traders said the rally may have been due to relief as the uncertainty had been cleared away. Continuación...