Is Teacher Wang of the National Examination Teaching Consultation Center reliable?

Not very reliable, try to choose institutions that friends have visited and have a good evaluation, or directly choose well-known training institutions to prevent being fooled.

There are a lot of complaints on the internet, so beware of being fooled.

I suggest you ask your classmates or friends if they have been there, and ask them on the spot to see if the answers to the questions are professional and if there are any successful cases. Some of them must be reliable, but you have to learn to distinguish them.