Chinese companies\u2019 access to American capital is imperiled for all sorts of reasons, says Hong Kong columnist Robyn Mak. The stingy LBO of\xa0New York-listed Sina by its CEO won\u2019t\xa0help. Also, British fast-fashion retailer Boohoo\u2019s not-quite dark satanic mills are in the spotlight. See acast.com/privacy for privacy and opt-out information.