Pence, who has often struck a hawkish tone on China, spoke just weeks before Trump is due to attend a summit in Chile where he has said he hopes to close a "phase one" trade deal with Chinese President Xi Jinping.

Protesters say they are planning to raise signs and chant slogans in support of Hong Kong before the end of the first quarter.

NBA Commissioner Adam Silver told the Brooklyn Nets and Los Angeles Lakers that the league is still expecting them to play as scheduled this week.