China Southern leads slide in Chinese airlines on weak H1 estimates

** Hong Kong shares of China Southern Airlines 600029 fall 4.5% to HK$3.59, their lowest since May 21, and on course to snap two consecutive session of gains

** The Chinese airline expects to record H1 net loss of 1.3-1.8 bln yuan ($181.2 mln-$250.9 mln) as the company is "still under great operating pressure" amid impact of the high-speed railway, increase in uncertain factors in the international environment

** Shares of rivals also drop with Hong Kong shares of China Eastern Airlines 600115 slip 2.1% to HK$2.84, after company sees H1 net loss at 1.2-1.6 bln yuan

** Hong Kong stock of Air China 601111 falls 2.2% to HK$5.34, after the airline sees H1 net loss in 1.7-2.2 bln yuan range

** Shanghai-listed shares of China Southern 600029, China Eastern 600115 and Air China 601111 fall 2.1%, 1.3% and 1.7% respectively

** In China, the blue-chip CSI 300 Index 3399300 slips 0.2%, while in Hong Kong, the Hang Seng Index HSI gains 0.6%

($1 = 7.1747 Chinese yuan renminbi)