It is well known that Communist China (PRC) is really sensitive about countries that establish formal relations with the Republic of China in Taiwan (ROC).
One prominent example is the PRC reaction on establishing the Lithuania-Taiwan office. (here and below highlight in quotations mine)
The relationship between Vilnius and Beijing has been on the brink since November 2021, when Lithuania allowed Taiwan to open its de facto embassy in the country, making Beijing block exports from Lithuania and slap sanctions on Lithuanian officials. — Deutsche Welle
At the same time, there is a "de facto embassy" of ROC in Russia: "Representative Office in Moscow for the Taipei-Moscow Economic and Cultural Coordination Commission" — Official site
The Wikipedia has this to say:
The Representative Office in Moscow for the Taipei-Moscow Economic and Cultural Coordination Commission represents the interests of Taiwan in Russia, functioning as a de facto embassy in the absence of diplomatic relations. — Wikipedia
[…] the Moscow-Taipei Coordination Commission on Economic and Cultural Cooperation is considered as a formal foreign office — Wikipedia
Moreover, this very institution acts as a hub for consular services for citizens of other countries that have not established such offices with ROC, expanding the consular jurisdiction to a good dozen of countries of the region.
Up until 24 February 2022, even citizens of Ukraine had to travel to Moscow to obtain Taiwan visa. (ask me how I know)
Question: Given that the office in Russia, which is not only a "de facto embassy", but has acted as a hub for strengthening the relationship between European states and Taiwan, why does the PRC apparently tolerate it, while at the same time getting particularly furious on other countries' similar institutions that "harm" PRC dominance even less?