“We are committed to respecting human rights and adhering to local laws in each market we operate in,” said Peter Pernot-Day, Shein’s head of strategy and corporate affairs. The new lobbying effort underscores how geopolitical tensions are squeezing Chinese companies that rely on markets in the West, where they face rising scrutiny from both governments and consumers. In the US, Chinese companies have become a target for politicians looking to feed off Americans’ anti-China sentiment. They’re also potential losers in the Biden administration’s push to diversify the country’s supply chains away from China, as well as efforts to change the law that allows Shein’s products and other small shipments from China to enter the US duty-free. Shein, specifically, is under the microscope for its alleged reliability on supply chains that run through the Xinjiang region of...