Is it okay to use the film provided by the 4S shop? How's the quality?

Now that the car company has gone bankrupt, what happens to the maintenance services promised by the 4S shop? The contract was signed with the 4S shop...

Are there no more 4S shops now, so should I go directly to a repair shop for maintenance?

I changed the transmission oil at 40,000 km at the 4S shop, and now at 100,000 km, I'm planning to replace it for the second time. I'm considering using Shell CVT transmission oil. Has anyone tried it? Is it okay to just clean the metal filter?

Why is maintenance at 4S shops so expensive, folks? Can I get maintenance done outside of 4S shops?

When will the 4S shop have cars in stock?

The official film from the Skoda 4S dealership that came with the Mingrui Pro has been used for two years. When would be a good time to replace it?

If I don't go to the 4S shop for maintenance during the warranty period, will it void the warranty? How much does it cost for maintenance at the 4S shop?

Do fellow car enthusiasts usually apply the film provided by BYD, or not? I've heard a lot about salespeople promoting upgrades.

Can I go to the Hyundai 4S shop for maintenance? 😂

Did you get your brake pads and brake discs replaced at the 4S shop? How's the quality? I just got mine changed today for 2500 RMB.