The Hang Seng Index dipped 134.93 points, or 0.76 percent, to open at 17,663.8 points on Tuesday.

Weighing on sentiment was the move by Canada, following the lead of the United States and European Union, to impose a 100 percent tariff on imports of Chinese electric vehicles and a 25 percent tariff on imported steel and aluminium from China. (With additional reporters from Xinhua and Reuters)