In May 2018 workers at Jasic Technology, a listed welding equipment maker in Pingshan, Shenzhen, began campaigning for a workplace union to press grievances over overtime pay, fines and working conditions. In mid-July 2018 leading activists were dismissed and beaten by company security guards. On 27 July 2018 thirty workers and supporters were detained by police in Pingshan District, and a further fifteen supporters who went to the police station were taken away on 30 July 2018. The case drew student solidarity groups from universities across China and became the best-known Chinese labour dispute of 2018, and it ended in defeat for the union campaign.