Chinese Language Tutors in Beijing

I have been studying Mandarin for the past year+ and plan to go to China for 3 weeks later this year (May - July time frame) to studying intensive Chinese with one-on-one courses. Ideally, I would like to be in Beijing (for the sake of the accent) or Shanghai but am open to other cities. I plan on studying Protected content per day in one-on-ones. There are an abundance of schools but tuitions are relatively high. A few years ago, I did something similar in Brazil and, as opposed to taking courses in a school, I found local private tutors and did courses with them. As such, I thought I would try the same in this case.

As such, has anybody taken classes from trained teachers in Beijing or Shanghai they would recommend?

Thanks in advance.