The fourth World Internet Conference opens in Wuzhen, Zhejiang province, Dec 3, 2017. [Photo/IC]

WUZHEN - Chinese President Xi Jinping sent a congratulatory letter to the fourth World Internet Conference, which opened on Sunday in East China's watertown of Wuzhen.

The conference from Sunday to Tuesday is themed on "Developing digital economy for openness and shared benefits -- building a community of common future in cyberspace."