The team has so far conducted corrective surgeries on 52 Tibetan children to cure their strabismus.

Every time Wang went to Tibet, he had to struggle with high-altitude stress. He needed to take painkillers and sleeping tablets at night. Last year, he went to Tibet as scheduled, even though he hadn't completely recovered from a prostate surgery which he had undergone two months earlier. It added further personal challenges to the trip.

Wang plans to leave for Tibet this month, if the pandemic situation allows, for his seventh visit to the region. This time, they will review the conditions of the children who had treatment for strabismus and amblyopia over the past two years. And they plan to conduct 100 free cataract surgeries.

Wang plans to check the eyes of all the children in five counties of Tibet within the next five years, providing those who need it the proper treatment.

"I am delighted that I am needed and recognized by local people. Their trust encourages me to do more and to do it better," says Wang.