Isn't it impossible to have a meeting in a financial designated hotel?

Under the current policy environment, it is possible in principle. Because the number of designated hotels around the country can certainly meet the requirements of the conference, and the quality is enough to meet the requirements of most conferences, so unless you have enough reasons to prove that no designated hotel can meet some of your necessary requirements, don't think about hitting the gun. Now is not the time to show your ability by acting alone.