: Xinhua News Agency, Beijing, (reporter Ren Fen) - The domestic airline that is the first to mainly operate domestically produced aircraft, Happiness Air, has officially entered the trial operation phase. Since the opening of the Xi'an to Yan'an route on July 30, the Xi'an to Zhengzhou route also commenced yesterday with a low-price ticket trial at 100 yuan. It was learned by the reporter yesterday that tickets for these two routes during the trial flights have already been... August 15, 2009... Due to the shortcomings of regional aircraft, it has led to the airlines...