How about CITIC Haizhi Maintenance?

CITIC Haizhi is well maintained. CITIC Haizhi Maintenance Company has provided marine helicopter services for more than 30 Chinese and foreign oil companies, and provided official flights, aerial photography, air travel, short-distance transportation, emergency rescue and disaster relief, medical assistance and other flight services for government departments, enterprises and institutions. The total flight time exceeds 6,543,800+hours, and the annual flight hours account for 22% of the total national general aviation flight. The market share of offshore oil helicopter service exceeds 80%, and it is in a leading position in the same industry in China. CITIC Offshore Helicopter Co., Ltd, formerly known as China Offshore Helicopter Professional Company, is a national general aviation company approved by the the State Council executive meeting, aiming at promoting the development of offshore oil and general aviation in China. The company was established in February 1983, and was restructured into a joint stock limited company in February 1999. In July 2000, the stock was issued and listed on Shenzhen Stock Exchange. The company, referred to as COHC, is a state-owned general aviation enterprise under CITIC Group.