A sailor introduces the vessel to teenagers on April 21, 2026, during the open ship day events to celebrate the 77th anniversary of the founding of the Chinese PLA Navy. (eng.chinamil.com.cn/Photo by Wang Guangjie)人民海军成立77周年，海军举行舰艇开放活动。图为4月21日，讲解员向登舰参观的学生介绍舰艇。（英文中国军网/王光节 摄）