"Both of these examples raise serious security questions about what authority CFIUS [Committee on Foreign Investment in the United States] currently has, or may need to be added, to address these concerns," said the letter signed by 14 Republicans and two Democrats.

In other words, if Wanda continues with its investment dump in the US - which experts see as vital to developing into a media giant - it could potentially trigger US regulatory oversight of the deals.

'Over-worried'

Wanda declined to comment to The New York Times regarding the letter, but on Sept 28, Wang told CNN that the lawmakers were "over-worried."

Wanda has been making headlines in the last several weeks with its investment alliance with Sony Pictures and discussions about acquiring control of Dick Clark Productions.

The Sony deal is being billed as an open-ended partnership, where Wanda will invest in Sony films and take a role in highlighting "China elements" of the movies it invests in, a contrast to the passive roles Chinese investors have played in the past, the company said.

Acquiring Dick Clark Productions would put Wanda in charge of a company that produces popular American award shows, such as the Golden Globe Awards, the Billboard Music Awards and Miss America.

In his Sept 28 interview with CNN, Wang also said that he would keep investing in US companies and was shopping for at least a 50 percent piece of one of Hollywood's "Big Six" studios.

It is a move that experts warn could bring up anti-trust issues, since Wanda already owns AMC and could potentially own Carmike Cinemas as well.

Stanley Rosen, director of the East Asian Studies Center at the University of Southern California, said that Wanda has to "be a little bit worried about how much they can push at this point, and they may want to stand back a bit" if they want to prevent more attention from regulators.

Rosen said Wanda has been getting a lot of negative attention recently with its ongoing battle with the Beverly Hilton for developing a $1.2 billion real estate project directly across the street from the Beverly Hilton hotel.