Tourism authorities in the Guangxi Zhuang autonomous region are expecting explosive growth in travel by people in neighboring Guangdong province, with high-speed train service between the areas launched on Friday.

The number of trips is projected to exceed 30 million in the coming year, said Jia Yucheng, deputy director of the tourism administration of Guangxi.

Guangdong is the No 1 source of tourists to Guangxi, said Jia.