President Joe Biden signed a bill into law on Thursday to block imports from China’s Xinjiang region unless businesses can prove the items were made without forced labour, the latest in a series of intensifying US penalties against the Asian giant for human rights abuses. The measure had to overcome some initial hesitation from the White House, as well as corporate opposition, to win final passage last week in the Senate, following earlier House passage. Biden also signed a separate bill on Thursday funding research into a cure for Lou Gehrig’s disease. “Today, I signed the bipartisan Uyghur F…