Aerial photo taken on Jan. 20, 2021 shows the Dagu lighthouse which stands 12.9 nautical miles east of the Tianjin Port of north China's Tianjin Municipality. The 38.3-meter-high Dagu lighthouse with a light range of 17 nautical miles, has been put into use since May 1, 1978. (Xinhua/Zhao Zishuo)
