Other commentators have suggested Beijing use its holdings of US government debt or target American companies in China. : One of China's most prominent figures in global finance says Beijing should press Washington to end their tariff battle by clamping down on exports of goods needed by American companies, according to news reports Monday. The comments by Lou Jiwei, a former finance minister and chairman of China's sovereign wealth fund, follow reports regulators are squeezing American companies by slowing down customs approvals and stepping up environmental and other inspections.