A helicopter of Tianjin Municipal Public Security Bureau performs during the opening ceremony of the 6th China Helicopter Exposition in north China's Tianjin Municipality, Sept. 14, 2023. The 6th China Helicopter Exposition opened here on Thursday, highlighting innovation, development and win-win cooperation.Spanning an exhibition area of approximately 160,000 square meters, the four-day expo has a total of 65 helicopters and unmanned aerial vehicles (UAVs) on display, drawing over 350 exhibitors, including many major global helicopter manufacturers. (Xinhua/Zhao Zishuo)