China shares lifted by aviation firms, Hong Kong benchmark flat
* HSI flat, H-shares +0.5 pct, CSI300 +0.4 pct
* China aviation, aerospace firms jump on aircraft progress
* China Oilfield hits 7-month high helped by earnings
* China Resources Power slips after president investigated (Updates to midday)
By Grace Li
HONG KONG, Aug 27 (Reuters) - China shares eked out slim gains on Wednesday morning, thanks to stronger aviation and aerospace sectors that gained on strides made in manufacturing the country's first large aircraft.
Hong Kong's main share index barely changed, but the gauge for H-shares outperformed underpinned by strength in the shares of China Oilfield Services due to strong earnings.
By midday, the Hang Seng Index was flat at 25,067.18 points. The China Enterprises Index of the top Chinese listings in Hong Kong rose 0.5 percent.
The CSI300 of the leading Shanghai and Shenzhen A-share listings added 0.4 percent, while the Shanghai Composite Index edged up 0.2 percent at 2,212.12 points. Continuación...