BEIJING — More than 50 people have been killed on China’s roads in four major accidents since Friday, as hundreds of millions of Chinese journey home for the Lunar New Year on Feb. 10.

In the southwestern province of Sichuan, a bus overturned Friday, killing 11 people, according to the Gulin county government.

In the neighboring province of Guizhou, 13 people died after an overloaded bus tumbled down a 330-foot slope, the official Xinhua News Agency reported Saturday. It said the fatal crash in Congjiang county left another 21 people injured, including 11 in serious condition.

On Friday night in the northwestern province of Gansu, a coach bus went off the road at a curve, rolled down a slope and caught fire, killing 18 people and injuring 32 others, according to the provincial government and state media.

In the central province of Henan, at least 10 people were killed after a truck loaded with fireworks for Lunar New Year celebrations exploded Friday morning, collapsing an elevated section of highway.