An investigation into a Chinese factory that manufactures the popular Labubu toys alleged several labor rights violations, including underage employment, blank contracts, overtime schedules above legal limits and “unrealistic” production targets.

China Labor Watch (CLW), an independent U.S.-based civil and social organization, conducted the investigation at a Shunjia Toys facility that makes Labubu toys for Chinese designer toy company Pop Mart. The probe featured interviews with 51 employees, including workers from the assembly, machine sewing, hand sewing and injection molding departments.