This aerial photo taken on Feb. 11, 2023 shows the gate of the Heihe Area of China (Heilongjiang) Pilot Free Trade Zone in northeast China's Heilongjiang Province. Recently, enterprises in the Heihe Area of China (Heilongjiang) Pilot Free Trade Zone have been busy with production to meet the orders and to make a good start in the first quarter of 2023. (Xinhua/Xie Jianfei)