This company uses the spit test. You have to spit in a container and send this to the laboratory. This company is based in California, USA, and most of their database entries are USA citizens. They do have the majority of Chinese Adoptees in their database. 23andme does NOT allow the uploading of RAW DNA from other companies. If you want to be in their database, you have to take their test.
If you have tested your DNA at 23andme, and you want to download your RAW DNA (so you can upload it to other sites), please follow these instructions.
The file is a ZIP file. Don't unzip this file, just store it in a safe place on your computer. You can rename it so you recognize it later.
23andme does NOT accept the transfer of a RAW DNA file to their database. If you want to be in their database, you have to buy and take their test.