According to Tesmanian, citing China Automotive Information Net's data, Tesla's new car registrations rose to 6,643 in December. That's of course without much of a contribution from the Tesla Gigafactory 3, because customer deliveries are only just ramping-up from January 2020.
In 2019, the total number of Tesla registrations increased by 161% year-over-year, from 16,360 to 42,715.
That's a lot, but still just a fraction of 367,500 sales globally, and far from the European level yet (probably above 100,000). The Chinese position is expected to improve in 2020, when the Made-in-China (MIC) Model 3 will reach full scale.
There is a big chance that we will see more than 10,000 sales a month in Q1, and more than 100,000 sales in 2020 total. How much "more" above 100,000 is an open question.