廈門航空
Although there was considerable resistance to CAAC's call to rationalise the industry, in July 2000, the administrative body announced that the ten airlines under its direct management will be merged into three airline groups, revolving around Air China, China Eastern Airlines and China Southern itself. Within a month, China Southern had started absorbing Zhengzhou-based Zhongyuan Airlines, which at the time operated five Boeing 737s and two Xian Y-7 turboprops. The carrier would later merge with Shenyang-based China Northern Airlines and Urumqi-based Xinjiang Airlines to form China Southern Air Holding Co., a process that took more than two years and would culminate in China Southern's acquisition of their US$2 billion's worth of assets (as well as $1.8 billion of debt) in November 2004. Consequently, China Southern's fleet expanded from some 140 aircraft to over 210. The takeovers meant that the carrier became the main airline at Shenyang and Ürümqi, with passenger numbers' jumping from 28.2 million in 2004 to 44.1 million in 2005. As a result, China Southern Airlines became one of the "Big Three" carriers in the country. Since then, it has successively taken over shareholding stocks and joined the equity in numerous Chinese carriers. The airline is the major shareholder of Xiamen Airlines (55%) and Chongqing Airlines (60%); it also invests in Sichuan Airlines (39%).