4000 yuan, go to the Plastic Surgery Hospital of China Academy of Medical Sciences. According to the data related to cosmetic surgery, the average price of Botox in Beijing in 2022 was 3,554 yuan, of which the lowest was115 yuan in July and the highest was 5,243 yuan in August. Zhao is a plastic surgeon in the Plastic Surgery Hospital of China Academy of Medical Sciences. You can find him in this hospital. The specific method is as follows:

1. Take the transportation to the Plastic Surgery Hospital of China Academy of Medical Sciences.

2. Go and register with Dr. Zhao.