Please let me know Inquiry counter email address of Kunming International Air-port

Dear Sir,
My friends will go to Zhengzhou, transit from Kunming. There is no more direct flights to Zhengzhou from Myanmar. They booked air-tickets to ZHENGZHOU by transit from Kunming.They have never gone abroad and no more experience to use transit flight. So, I want to ask some information from inquiry counter of KUMINg international air-port. So , please let me know information counter or inquiry department of KUMIN international airport.

Best Regards
Zaw Myo Htay