U.S. says the Chinese telecom company’s equipment is a security risk.

A former engineer and a Chinese businessman have been charged with economic espionage and conspiring to steal trade secrets from General Electric Co to benefit China, according to an indictment unsealed by the U.S. Justice Department on Tuesday.

Lighthizer, Mnuchin set to return to Beijing on Tuesday with both sides aiming for draft deal after subsequent talks in Washington.

Driven by anxiety over the success of China’s growth model, the US under Trump has sought to apply “maximum pressure” through its trade war. However, an eventual bargain will serve to cement China’s leadership role not only in economics, but also global governance.

Under Trump the US has abandoned its former strategy of engagement with China, instead adopting a hardline stance. But his “trade war” has not borne fruit, while a recent thaw in negotiations shows the possibilities for renewed Sino-US cooperation.

The smaller deficit suggests U.S. economic growth in the first quarter might have been stronger than previously estimated.

Negotiators aim for signing ceremony in late May or early June.

U.S. negotiators have tempered demands that China curb industrial subsidies as a condition for a trade deal after strong resistance from Beijing, according to two sources briefed on discussions, marking a retreat on a core U.S. objective for the trade talks.

The United States and China have largely agreed on a mechanism to police any trade agreement they reach, including establishing new “enforcement offices,” U.S. Treasury Secretary Steven Mnuchin said on Wednesday.