Authorities have arrested four labor activists who were helping campaign for workers’ legal rights, Reuters reported, citing lawyers for two of the activists. Zeng Feiyang, one of China’s most prominent labor activists, was charged with “disturbing social order”, as were activists Meng Han and Zhu Xiaomei. He Xiaobo was arrested on a charge of embezzlement, according to China Labor Watch. Police in Guangzhou detained seven labor activists in December, two of whom have since been released. The number of known strikes in China surged to a record 2,774 in 2015–double the previous year, according to Hong Kong-based advocacy group China Labour Bulletin.