Did you just run into a file that has a digital signature from Douyin Vision Co., Ltd.? If that's the case, please read on.
You'll probably see Douyin Vision Co., Ltd. when double-clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screencap shows:

You can view the digital signature details for Douyin Vision Co., Ltd. with the following steps:
Here is a screenshot of a file digitally signed by Douyin Vision Co., Ltd.:

As you can see in the screengrab above, Windows reports that "This digital signature is OK". This means that the file has been published by Douyin Vision Co., Ltd. and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can view all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also see the address for Douyin Vision Co., Ltd., such as the street name, city and country.
DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1 has issued the Douyin Vision Co., Ltd. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screencap above.
The following are the Douyin Vision Co., Ltd. files I have gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Douyin Vision Co., Ltd. files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Douyin Vision Co., Ltd..
| Detection Ratio | File Name |
|---|---|
| Not available | ps_server.exe |
The analysis has been done on certificates with the following serial numbers: