Hong Kong police fired tear gas in late night street clashes with anti-government protesters, ahead of a potentially pivotal meeting between Hong Kong's leader and China's president in Beijing on Monday. Hong Kong Chief Executive Carrie Lam, in the Chinese capital for a regular duty visit, is set to meet Xi Jinping amid speculation the visit could yield fresh directives on the city's political crisis, including a possible cabinet reshuffle. Hong Kong has been embroiled in its worst political crisis in decades since June with anti-government protests posing a populist challenge to China's Xi.