BEIJING -- The sister of President Trump's son-in-law Jared Kushner has been in China courting individual investors with a much-criticized federal visa program that provides a path toward obtaining U.S. green cards.

Kushner's sister Nicole Meyer promoted One Journal Square, a Kushner Companies' development in Jersey City, at an event Sunday at the Four Seasons Hotel in Shanghai, according to participants.

The pitch seeks to raise funds from Chinese investors through the U.S. government's EB-5 visa program, which allows permanent U.S. residency for those who finance projects that create a certain amount of jobs.

The event was organized by Beijing-based immigration services company QWOS and Kushner Companies, according to an advertisement on the Chinese company's website, which says the project is seeking $150 million from 300 EB-5 investors.

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Kushner, a senior adviser to Trump, stepped down as chief executive of the Kushner Companies in January and has sold stakes in several properties to help allay concerns about conflict of interest. His family's promotional efforts in China come amid widespread criticism of the EB-5 visa program, which has grown popular among wealthy foreigners seeking to move to the U.S. but faces allegations of fraud and misuse.

Critics say many of the investments purportedly aimed at assisting poor areas of the U.S. have instead wound up going to projects in more affluent neighborhoods, while many programs have been badly hit by fraud scandals. U.S. lawmakers have been weighing proposed changes to the program, which would likely affect companies such as Kushner Cos. should it want to raise funds from such investors. Earlier this month, Congress extended the EB-5 program in its current form through Sept. 30.

Staffers at QWOS' offices in Beijing and Shanghai either refused to comment or did not answer repeated calls.

In a statement, his personal lawyer told CBS News that Kushner "has no involvement" with his previous companies, "divested his interests," and is not a beneficiary of the family trust.

A Kushner Companies spokesperson also sent CBS News a statement apologizing on behalf of Ms. Meyer if "mention of her brother was in any way interpreted as an attempt to lure investors."

Roberts said in a statement that Kushner has divested his interests in the One Journal Square project by selling them to a family trust of which he, his wife and his children are not beneficiaries, a mechanism suggested by the Office of Government Ethics.

"As previously stated, he will recuse from particular matters concerning the EB-5 visa program," the statement said.

Now led by Kushner's relatives, the Kushner Companies had earlier been negotiating with China's Anbang Insurance Group to provide what could be hundreds of millions of dollars in equity for redevelopment of a Manhattan office building. Those negotiations, which had drawn criticism from lawmakers and government ethics experts, ended in March. Critics saw it as a potential attempt by China to curry favor with the White House.

The Chinese company's advertisements for the Journal Square development described the project as "Kushner 1," with punchy subtitles declaring that it has "government support" and is "founded by celebrity developers," without elaborating.

Bi Ting, a 34-year-old woman who attended the Shanghai event, said having the name of the U.S. president's son-in-law associated with it was "a bonus for the project."

Bi said Kushner's sister Meyer spoke for more than 10 minutes, describing the history of the Kushner family and the highlights of the project. Meyer spoke to the audience in English, aided by a translator, and didn't take any questions, Bi said.

The proposed EB-5 investment would account for around 15 percent of the total investment of $976 million required for the project. According to QWOS's advertisements, the development comprises two 66-story towers of 1,476 luxury apartments, as well as commercial and retail space.

Another person who attended the forum in Shanghai, who would only give her surname, Wang, said people in the conference said that Trump's son-in-law was a shareholder of the Kushner Companies, but "he has already quit."

"I don't know if the connection with the president is good or not, it's hard to say," added Wang, who is from Shanghai.

The other participant, Bi, who is pregnant, said she was considering immigrating to America to give her child an academic environment that is "more relaxing; where one can pursue real interests and where the child can do something that they really want to do."

Organizers prevented reporters from attending the event, saying it was a private function even though it is publicly advertised. On Saturday, Meyer spoke at a similar promotional conference in Beijing, details of which were first reported by the Washington Post and the New York Times.

Earlier this year, Kushner spoke with a group of investors, including the venture-capital firm Fifth Wall Ventures, about selling his stake in WiredScore, a company that certifies buildings with high-quality internet connections.

While critics of the Trump administration claim that Mr. Trump has not done enough to remove himself from conflicts of interest between his businesses and the Oval Office, this is one of many efforts from Kushner to divest himself from potentially problematic business ties after taking on the senior level White House official position.

Kushner resigned from more that 260 entities in addition to selling off 58 businesses and investments that lawyers identified as possible conflicts of interest.

Meanwhile, Ivanka and her husband have taken on public service and both have met with a several foreign dignitaries.

Kushner even visited Iraq before the secretary of state or national security adviser.

"His son-in-law Jared Kushner, a senior adviser, is arguably the most powerful person in the White House with a huge portfolio," said Philip Rucker, White House bureau chief for the Washington Post.

Just 102 days in, Kushner has been tasked with criminal justice reform, tackling the opioid crisis, Middle East diplomacy and cybersecurity. The unique familial power is having an impact on the West Wing.

"It can be very dangerous for other advisers to fight with them," Rucker said. "We saw that a few weeks ago where Steve Bannon, the chief strategist, got into a real ideological debate with Jared Kushner and it did not end that well for Steve Bannon."

When asked whether these new pivotal roles taken on by Mr. Trump's family are surprising, historian and author Doug Wead said, "No. It is not surprising. It happens over and over and over throughout history. Presidents eventually come to lean on the people who are the most loyal. It ceases to become competence and quickly becomes who can I trust?"