Will I not be able to enter if I purchase tickets from a third-party other than the Forbidden City's official website?

The official website repeatedly emphasizes not to buy tickets outside the official website, but I couldn’t get tickets for the treasure hall on the official website, so I bought them on Amap. I don’t think it’s safe.
Amap usually uses Ctrip tickets. If you buy tickets on the official website of the Forbidden City, you must make a reservation to enter the palace.
Amap usually uses Ctrip tickets. If you buy tickets on the official website of the Forbidden City, you must make a reservation to enter the palace.