Why did Chinese soldiers rely on night attacks and ambushes in the Korean War?

During the Korean War, Chinese forces relied on night attacks and ambushes as a tactical formula to counter the superior firepower and air capabilities of the United Nations Command (UNC).12

Because the Chinese lacked sufficient artillery, trucks, and ammunition, they were highly vulnerable to UNC air strikes on road-bound columns. By operating at night and utilizing concealment, they minimized their exposure to these air attacks. This approach allowed them to achieve local surprise and exploit their numerical superiority to cut off supply lines and withdrawal routes, effectively neutralizing the technological advantages held by their opponents. These tactics were central to their strategy of luring UNC forces into traps, surrounding forward elements, and forcing retreats, as seen during the Chinese offensives in late 1950 and early 1951.21