Having denied those allegations, Chinese officials are focusing instead on ways to boost U.S. exports to China. For instance, China’s top economic-planning agency is proposing to increase U.S. semiconductor sales to China to a total over six years of $200 billion, according to U.S. companies briefed on the plan, or a level five times that of current exports. Under the proposal, however, that increase would be generated in part by moving assembly operations of U.S. semiconductors from third countries like Mexico and Malaysia to China, allowing those products to be counted as U.S. exports rather than those of other countries. . . . So far, U.S. companies have rebuffed the Chinese offer as lacking substance and making them more dependent on China, when they are trying to lessen their dependence. They have urged the U.S. government not to accept the proposal. One U.S. chip maker said it had been lobbied by the U.S. Commerce Department on the merits of the plan. A senior U.S. administration official said U.S. government agencies were seeking opinions on the Chinese proposal but weren’t advocating for it. The NDRC didn’t immediately respond to a request for comment.