Chinese companies have been buying up foreign businesses — including American ones — at a record rate, and it’s freaking out lawmakers. There is General Electric’s sale of its appliance business to Qingdao-based Haier, Zoomlion’s bid for the heavy-lifting-equipment maker Terex Corporation, and ChemChina’s record-breaking deal for the Swiss seeds and pesticides group Syngenta, valued at $48 billion.