Vector similarity of patent classification number

I suggest you test it once with HowNet. After all, this is a major event related to your graduation. If it doesn't pass, it will be miserable. Yy below 30 does not mean that HowNet will also be below 30, and the databases of the two detection systems are different. Hownet is mostly a local database, yy is mostly a network database, so you still have to test it again with Hownet, which is more reassuring!