But China had imposed measures on soybeans and cars to retaliate against American tariffs last summer on $50 billion of Chinese goods. By dropping them, without requiring the United States to abandon theirs, China is signaling that for now it is willing to accept higher American tariffs on some of its goods, provided they are not applied more broadly.

China’s other peace offerings are more ambiguous.

Chinese lawmakers last month released a draft of a proposed law that would stop local officials from forcing foreign companies to transfer their technology as a cost of doing business. The Trump administration says that Chinese industries like cars and aviation have benefited from American technology.

The law may not change things meaningfully, said Donald Clarke, a specialist in Chinese law at George Washington University. The draft is vaguely worded, he said, and doesn’t acknowledge that the pressure American companies face to share their know-how often comes from behind-the-scenes maneuvering rather than strict government requirements.

As with many laws in China, it could also be moot if local governments decide not to enforce it or if penalties are not stiff enough.

“These forced tech transfers that people complain about don’t occur because some government department issues an order saying, ‘Transfer this tech,’” Mr. Clarke said in an email.

“It’s done through the government department getting involved behind the scenes in the negotiations, or not granting discretionary permission to do something unless some tech is transferred. It’s very hard to stop through a specific rule.”

Still, Chinese analysts say the pledges are significant. Chinese laws and regulations are often succinct — only a page or two when American laws or regulations would require dozens or even hundreds of pages. The real work lies in carrying out the regulations, and Beijing is now prepared to impose the new rules diligently, Chinese analysts say.