If you just want to get the OCP certificate, it's the same everywhere, and you can meet your requirements. If you really want to learn some skills. Then I suggest you consider ITAA, which is near Zhichun Road in Haidian District. My OCP and OCM are both studying here. At that time, I was in OCP, and I always had no time to go because of my work. Fortunately, I signed up to send a video at that time, and I can still make up for the missed courses. The most important thing is the internal experiment manual, which helps me a lot. At that time, the teacher asked that the experimental manual must be mastered. I'm about to smash three experimental manuals. When I found out that I was studying OCM, my practical ability was very strong, which was also very helpful for my work. The brothers in the group helped me, and the teacher was there. You can always ask questions. It can be said that it has benefited me a lot. Not much to say, go and see for yourself.