China-founded fashion giant Shein told employees it is stepping up its efforts to keep products made with forced labor off its site, citing tougher U.S. enforcement to screen low-value parcels that previously received little customs scrutiny.In a memo to senior managers, Shein’s executive chair, Donald Tang, said the company is prioritizing compliance and called on U.S.-based managers to report potential issues, saying people who raise “legitimate concerns” won’t be subject to any retribution. S...