this is an interesting question and I like to know the answer too

i think the telegram group is new have one or two days

i think you can find this information in their website

i think we can't mining them

ViValid opens an opportunity to create the first decentralized, immutable, and trustworthy, community-driven ledger of collectibles that contains the history of value and ownership changes.
I like your project. Do you plan to use KYC procedure at your ICO? Not sure if your fun will be escrowed?

I saw some updates in their twitter, will they publish the updates there normaly?

How exactly validators will be chosen? Do you need to prove your skills somehow?

Who are your partners to help you assess the worth of valuables in this project?
(If yes) Are they responsible if their assessment is wrong with reality?

how can I join to the telegram group?

I think you can find their partners in their website