Beijing — China executed two men who carried out deadly attacks in November that killed dozens, raising concerns about what it called “revenge against crimes against society,” state media reported Monday.

62-year-old Fan Weiqu, who said the government crashed his car into a crowd near the stadium In the southern city of Zhuhai, at least 35 people were killed and 43 others were seriously injured, executed on Monday. The attack was the country's deadliest in more than a decade, authorities said, and came on the eve of the country's annual air show held by the People's Liberation Army. Police said Phan was upset over his divorce.

Also in November, Xu Jiajin, 21, killed eight people and injured 17 in a stabbing attack at his vocational school in the eastern city of Wu. Police said Wu had failed his exams and was unhappy with his pay during the internship was also carried out on Monday, according to state-run CCTV.

The two men's death sentences were handed down by the Intermediate People's Courts of Zhuhai and Wuxi, respectively, in December and upheld by the Supreme People's Court, according to state media.

The killings prompted Chinese President Xi Jinping to call on local governments to take measures to prevent such attacks, known as “revenge against crimes against society”.

China has seen a series of attacks in which suspects appear to have targeted random people. including school children. In October, a 50-year-old man was arrested after he allegedly attacked children at a school in Beijing, injuring five people. In September, three people were killed in a knife attack in a Shanghai supermarket.

China is believed to execute more prisoners each year than the rest of the world combined, although the exact total is considered a state secret.