May 8th marks the World Smile Day, a global festival established by the World Mental Health Organization in 1948 to celebrate the human expression. Smile is universal, so is peace. Check out these smiling moments from Chinese peacekeepers. They are assigned to the 11th Chinese Peacekeeping Infantry Battalion to the United Nations Mission in South Sudan (UNMISS). (eng.chinamil.com.cn/Photo by Lu Chenchen, Wang Kunbo and Li Ziyang)1948年，世界精神卫生组织将每年的5月8日定为“世界微笑日“， 希望通过微笑促进人类身心健康。微笑是不分国界的，和平同样也是。让我们一起走进第十一批赴南苏丹朱巴维和步兵营,寻找属于维和官兵脸上“别样”的微笑。（英文中国军网/路辰辰、王昆博、黎子阳 摄）