First, your statement is outright false, one example being the plant operated until recently by a subsidiary of SAIC-Volkswagen near Urumqi, the capital of China’s Xinjiang Region. Volkswagen had to leave the joint venture with SAIC exactly over forced labour allegations.
And second, even if true it wouldn’t matter as forced labour in China doesn’t just take place in Xinjiang alone. There are many other examples across the country.