Pilot31, if you want to contact Hainan Airlines, you may do so. The following details tell you that the ways to contact them.
24 Hours Consultation Hotline: 86 (China's Country Code)- 898 (Hainan Province's Code)- 89999
----------
You may also send letters to them. The postal address should be:
HNA Development Building, 29 Haixiu Road, Haikou
Hainan Province, People's Republic of China
Postcode: 570206
----------
Hainan Airlines Company Limited
Fax Number: 86 (China's Country Code)- 898 (Hainan Province's Code) - 66739807
----------
Civil Aviation Resource Net of China