People perform at a cultural exchange activity between Chinese and Vietnamese youths in Vietnam's capital Hanoi, March 24, 2019. A cultural exchange activity between Chinese and Vietnamese youths was kicked off here on Sunday. (Xinhua/Wang Di)

Students practice calligraphy at a cultural exchange activity between Chinese and Vietnamese youths in Vietnam's capital Hanoi, March 24, 2019. A cultural exchange activity between Chinese and Vietnamese youths was kicked off here on Sunday. (Xinhua/Wang Di)

A student presents a just-finished Chinese paper cutting work at a cultural exchange activity between Chinese and Vietnamese youths in Vietnam's capital Hanoi, March 24, 2019. A cultural exchange activity between Chinese and Vietnamese youths was kicked off here on Sunday. (Xinhua/Wang Di)

People perform at a cultural exchange activity between Chinese and Vietnamese youths in Vietnam's capital Hanoi, March 24, 2019. A cultural exchange activity between Chinese and Vietnamese youths was kicked off here on Sunday. (Xinhua/Wang Di)

People perform at a cultural exchange activity between Chinese and Vietnamese youths in Vietnam's capital Hanoi, March 24, 2019. A cultural exchange activity between Chinese and Vietnamese youths was kicked off here on Sunday. (Xinhua/Wang Di)

People perform at a cultural exchange activity between Chinese and Vietnamese youths in Vietnam's capital Hanoi, March 24, 2019. A cultural exchange activity between Chinese and Vietnamese youths was kicked off here on Sunday. (Xinhua/Wang Di)