An article has been published in newsbtc.com, the announcement said that the sale of tokens for Bitcoin, Ethereum, and other virtual currencies remains “essentially unauthorized illegal public financing, suspected of illegal sale of tokens, illegal issuance of securities and illegal fund-raising.” The PBoC’s Shanghai branch then added that crimes enabled via cryptocurrencies have “seriously disrupted the economic and financial disorder.”
Source: https://www.newsbtc.com/2019/11/22/china-confirms-blockchain-not-bitcoin-pboc-crypto/
The Subject is somehow misleading. It should be "Bitcoin is being tagged as Illegal". China is always scared of something that could overthrow their government in every way possible. They are scared of something that they cannot have control of because Blockchain Technology is still advancing and its security is one of its best feature.