China's Tax Official newspaper calls for Crypto taxation, Does this indirectly legalize crypto?

The Chinese tax publication, China Tax News called for taxing past cryptocurrency profits using the Ex post facto law, also known as the principle of “law is not retroactive”. This means that the services provided by overseas exchanges to residents of China before the official crypto ban will now be required to pay tax in accordance with China’s tax law, on their income from China before the government officially announced the decentralized markets’ illicit status in the country.