A smart dog named Huahua can't seem to forget a doctor that took good care of it.

The dog walked 50 k over 15 days to return to the veterinarian after it was taken away.

The one-year-old dog stayed in a residential community in Chengdu, capital of Sichuan province, and was sent to a local pet hospital to be sterilized by a resident surnamed Han.

During the five days in the hospital, the dog got on very well with Wang Feng, the doctor. After it was returned, the dog walked back to Wang the next day.

About three weeks later, the doctor and Han decided to give Huahua to a pet lover who lived 50 km away. To Wang's surprise, he found the dog standing at the gate of his hospital 15 days later.

Source: chinadaily.com.cn/Chengdu Evening News