Can people go abroad by bus?信阳市五星社区新闻网 In Dongxing, Guangxi, the answer is yes. It is China's only port city connected to Vietnam by both land and sea, lying just across the river from Vietnam's Mong Cai. With this unique geographical advantage, Dongxing offers convenient cross-border commuting and a vibrant hub for trade and tourism. Come to Dongxing, sip an authentic Vietnamese coffee, hop on a cross-border bus, and embark on a spontaneous trip abroad.