Hello Shinnin,
I'm an information specialist working at National Library of Finland's Finto service where we are linking General Finnish Ontology (YSO) concepts to Wikidata items via Mix'n'Match tool, at the moment. As you may know, YSO is an indexing tool used widely in the Finnish library sector as well as in museums, archives, public administration and media. I noticed that you had already established a number of links between YSO and Wikidata in the Mix'n'Match project. We appreciate your activism, but would also like you to consider the following: YSO concepts are maintained by a team of information specialists and are a result of careful concept analysis. Each concept has a specific meaning, indicated foremost by its Finnish and Swedish preferred terms and its broader concepts in the ontology hierarchy, but also, in practical terms, by its use in indexing. Any links made should be in accordance with the precise meaning of the concept. Therefore, while we are happy to receive help, we also express that anybody who's willing to help us in linking YSO concepts to Wikidata should have excellent skills in Finnish and Swedish and should go through our linking guideline tour that we will be giving in Finnish in the near future. If you are interested in helping us more, please contact us. See our contact info here: https://www.kansalliskirjasto.fi/en/services/system-platform-services/finto
Best regards,
Tuomas / Finto / National Library of Finland