China largest music streaming service has had a whirlwind year.

With 800 million monthly users across multiple apps and a profitable business, Tencent Music Entertainment is gearing up for one of this year most anticipated initial public offerings in the US.

But the firm has landed in hot water in the months leading up to its first-time shares sale. Last week, Chinese investor Hanwei Guo accused TME co-president of using misinformation, threats and intimidation to compel him to sell his equity stakes in Ocean Music, which eventually became part of TME after Tencent QQ Music andChina Music Corporationmerged in 2016. Han has filed a motion for discovery in the US seeking information from Deutsche Bank AG, JPMorgan Chase Co., Bank of America Corp.

and other underwriters for TME IPO that the investor plans to use in an arbitration underway in China.

The investor is requesting TME co-president Guomin Xie Guo and other parties involved to return percentages of his equity stakes in the music vehicle and compensate him for economic losses. Han claims that he invested an equivalent of $26 million in Ocean Music in 2012 after Xie repeated invitation.

Xie first touted Ocean Music on the promise that the music company would turn a profit the following year and go public in three years, but he later informed Guo that the business was failing and threatened him to sell his shares, according to a statement from Guo legal advisor.

The investor eventually sold his shares &under duress.& The fraud allegation arrived two months after TME reportedly delayed its IPO due to weakening stock markets around the world.

The music giant has resumed the process and filed with the US Securities and Exchange Commission on December 3.

According to itsprospectus, TME plans toraise up to $1.23 billion with a listed price between $13 to $15 per share. TME is now in a quiet period where federal rules limit what the company can say in public ahead of its IPO, which Bloomberg reported is set to begin taking orders on December 12. A spun-out subsidiary of Tencent, TME operates three music streaming apps — QQ Music and what the CMC merger brought over, Kuwo Music and Kugou Music.

The entertainment group also runs China top karaoke app WeSing, on which users can record and upload their work. Unlike its money-losing western counterparts Spotify, TME is profitable thanks to a flourishing social business.

For example, WeSing users can send virtual gifts to reward content creators, from which TME takes a commission.

On the other hand,only 3.6 percent of TME users are paying subscribers as of the second quarter, part of a result of China rampant online piracy issue.

The ratio is much lower compared to other music services around the world but TME says in the prospectus that it expects revenue from paid subscriptions to increase over time.