After his first senior engagement in Switzerland on May 12, the negotiations with the United States were called "good", causing trade tensions to melt. However, both sides continued to slide thinly.

When CNBC asked the conversation was constructive, bystanders at the Asia-Pacific Economic Cooperation Trade and Trade Conference held in Jesus on Thursday met with U.S. Trade Representative Jamieson Greer, who undoubtedly gave no more details or clues about the upcoming meeting between the two sides.

Lee told reporters he had no information on whether a meeting would take place between U.S. President Donald Trump and his China XI Jiping.

On the same day, he was spokesman for the Ministry of Commerce of China, Yang Q, who did not provide similar restrictive tone at daily press conferences and did not provide new details about trade negotiations, which began an hour later than usual.

Trump touted earlier this week that he might talk to XI at the end of the week, and Beijing appears to be nervous about the prospect. Analysts expect direct involvement between the two leaders may indicate more meaningful progress in the talks.

The first round of negotiations in Geneva cheered in Beijing, a defense of China's uncompromising tariffs on Trump.

Both sides agreed to temporarily lower their responsibilities so that more time can be used to negotiate more permanent deals, while establishing a "communication mechanism" on economic and trade issues.

The tariff probation has also changed China's economic outlook, prompting some economists to raise their growth forecasts this year.

Despite the armistice, both sides continued to slide to each other in other areas, emphasizing the vulnerability of the nervous tie.

The U.S. Department of Commerce's Industry and Security Bureau warned companies on Tuesday against using Huawei's Ascent AI chips, criticized from Beijing for calling it "abuse of export control measures."

The Chinese Foreign Ministry strengthened its tone on Friday, condemning the United States' "long-arm jurisdiction" and saying China will "never accept it."

At the same time, China remains firm in export control of key minerals. Beijing sees rare earth minerals that are crucial to the U.S. industry as an effective leverage in trade negotiations with the Trump administration.

China's Ministry of Commerce urged local authorities to cut down on smuggling on rare earth in a statement earlier this week.

China began blocking exports of several rare earth metals on April 4 in retaliation against Donald Trump's "Liberation Day" tariffs.

Companies that want to export these items need to obtain approval from the Ministry of Commerce of China. At least four rare earth magnet manufacturers have obtained such export licenses, including suppliers of German automaker Volkswagen, Reuters reported.

When asked about control of rare earths during Thursday's regular press conference, a spokesperson for China's Ministry of Commerce said it had no information to provide.

Dennis Wilder, a senior White House intelligence official, said Beijing may have overestimated the importance of rare earth minerals to the Trump administration. Wilder is currently a senior fellow at Georgetown University’s Global Issues U.S.-China Dialogue Initiative.

"If China exaggerates the card, the United States will find other ways to obtain rare earths," he said.

He added that Chinese leaders also underestimated the need to demand stronger measures to combat fentanyl flows.

In addition, former US ambassador Nicholas Burns said on Wednesday that if China fails to cooperate on fentanyl, it will "have a price."

The upcoming negotiations are "high" for Beijing as China's tariff moratorium expires, Neo Wang, the leader of China's Evercore ISI, said in a report on Monday.

Wang said he expects Beijing to seek “a way to benefit the Republican Party in next year’s midterm elections.” These include commitments to increase purchases of U.S. goods or increase investment in U.S.

If Chinese officials determine that a broader trade deal is unlikely, priority could be given to addressing the 20% tax associated with fentanyl by making concessions to fentanyl enforcement and Tiktok's sales in the U.S., which Wang is described as Trump's "real goal."

- Evelyn Cheng of CNBC contributed to the story.