Answer

Definitely should be added, especially with the current interest around 151 and Gem packs!

Simplified Chinese Pokémon are here to stay. Please start adding them to your database.

We have added Chinese 151 and Gem Pack sets:
https://www.pricecharting.com/console/pokemon-chinese-gem-pack
https://www.pricecharting.com/console/pokemon-chinese-scarlet-&-violet-151
If someone can add the cards for the Nine Colors sets that would be super helpful. I see some image based card lists, but no text ones that give the name of each card.
https://www.pricecharting.com/console/pokemon-chinese-nine-colors-gathering-a
https://www.pricecharting.com/console/pokemon-chinese-nine-colors-gathering-b
We also have Chinese Promo set too. Please add any cards to that set.
https://www.pricecharting.com/console/pokemon-chinese-promo
If there are other important sets to add let me know.
Customer support service by UserEcho
We have added Chinese 151 and Gem Pack sets:
https://www.pricecharting.com/console/pokemon-chinese-gem-pack
https://www.pricecharting.com/console/pokemon-chinese-scarlet-&-violet-151
If someone can add the cards for the Nine Colors sets that would be super helpful. I see some image based card lists, but no text ones that give the name of each card.
https://www.pricecharting.com/console/pokemon-chinese-nine-colors-gathering-a
https://www.pricecharting.com/console/pokemon-chinese-nine-colors-gathering-b
We also have Chinese Promo set too. Please add any cards to that set.
https://www.pricecharting.com/console/pokemon-chinese-promo
If there are other important sets to add let me know.