How come this firm has been alive(& thrived?)

This firm Insilico Medicine has no drug to sell yet even after 10yrs of operation, and it still exists!

Moreover they're making big money and the seed stage is even E

How come a company that's got nothing to sell on the market could've come this far?

source: https://www.yicaiglobal.com/news/chinese-investors-lead-us-based-insilico-medicines-usd100-million-plus-series-e-round

highlights:

"Though the company has not yet brought any drugs to market, .."

"revenue increased 70 percent to USD51.2 million"