China shares fall on weak manufacturing, HK slips most in 6 weeks
* HSI -0.9 pct, H-shares -1.4 pct, CSI300 -1 pct
* Aluminium producers outperform on rise in prices
* Coal producers down as Beijing orders curbs on oversupply
* ZTE hits 8-1/2-month high after strong H1 earnings (Updates to midday)
By Grace Li
HONG KONG, Aug 21 (Reuters) - Hong Kong and China shares weakened on Thursday after a preliminary private survey showed growth in China's vast factory sector slowed to a three-month low in August, reinforcing concerns about increasing softness in the economy.
The HSBC/Markit Flash China Manufacturing Purchasing Managers' Index (PMI) fell to 50.3 from July's 18-month high of 51.7, missing a Reuters forecast of 51.5.
By midday, the CSI300 of the leading Shanghai and Shenzhen A-share listings lost 1 percent, while the Shanghai Composite Index was down 0.9 percent at 2,220.51 points. Both slipped the most in two weeks.
The Hang Seng Index was off 0.9 percent at 24,927.05 points. The China Enterprises Index of the top Chinese listings in Hong Kong fell 1.4 percent. If losses hold, these would be their worst daily losses in six weeks. Continuación...