Yeah it is from the superstition about dragon boy/girl. Probably will dip in year of the snake. Not many in China like snakes except for the Cantonese, and only then for culinary purposes.
I don't think the claim "China is said to be on track to having the largest Christian population in the world by 2030." is fake, although the sources used by the tweets might not be very credible. The rise of underground churches in China plus the rapid decline of Christianity in western countries can make the claim come true.