China's Communist Party leaders Monday kicked off their most important meeting this year, with President Xi Jinping expected to champion the Chinese model of governance while fighting protracted economic and political crises at home and abroad.

The four-day conclave comes at a critical time, as Hong Kong grapples with anti-government protests for the fourth month, drawing Western criticism of Beijing for trampling on the rights and liberties of Hong Kong people in its handling of the violent demonstrations.

China's economy is also growing at its slowest pace in nearly three decades, hurt in part by a prolonged trade war with the United States. Stable growth has been fundamental to the party's political legitimacy.