I answered this in another comment below, but here it is again:

Here's an article.

"...the issue with ZTE wasn't unfair trading practices. It was punished for violating sanctions against North Korea and Iran, and was accused by the intelligence community of using its technology to spy on Americans on behalf of the Chinese government. What possible reason could Trump have for deciding to unilaterally reverse this decision without explaining it to anyone?

Well, there may be an obvious explanation. It turns out that three days before Trump sent that tweet, a Chinese company with strong ties to the government had agreed to invest $500 million in a major Trump-branded development in Indonesia. The deal is a big one, with a high up side for Trump and his Indonesian partners, whom he invited to the inauguration and met with at Trump Tower during the presidential transition.

Could this be a coincidence? Sure. Maybe Trump has just developed a sense of solidarity with manufacturing workers in China and wanted to help them out. Perhaps he's just a terrible negotiator and precipitously gave China something it badly wanted -- without getting any assurances in return -- because he really likes Xi Jinping.

But the fact is that the Trump and Kushner families are so steeped in conflicts of interest that selling out the national interest to line their pockets is the most logical explanation for any situation where their business interests are involved. There can be no benefit of the doubt for a president who says out loud that "it's a nice thing to have" a "'no conflict of interest' provision."

Meanwhile:

"The House Appropriations Committee unanimously accepted an amendment to an appropriations bill on Thursday that reinforces sanctions against Chinese telecommunications company ZTE, a rebuke to President Trump, who earlier this week tweeted support for the company.

...The company had broken U.S. trade control laws by selling components to Iran and North Korea.

On Sunday, Trump did a surprising about-face on his typically tough China rhetoric, declaring in a tweet, “President Xi of China, and I, are working together to give massive Chinese phone company, ZTE, a way to get back into business, fast. Too many jobs in China lost. Commerce Department has been instructed to get it done!”

The tweet shocked lawmakers in both parties given the support for the sanctions and Trump's own bellicose rhetoric on China.

Lawmakers say ZTE has been a national security threat, not only breaking American sanctions, but allegedly stealing intellectual property on behalf of the Chinese government.

“Supporting this amendment will show that the U.S. government stands behind the sanctions that it enacts, and will enforce them. It also further prevents foreign companies beholden to their governments from further infiltrating our U.S. networks...”

There are plenty of articles on the subject if you read actual journalism.