"We planned to include 36 children in the campaign but received nearly 100 applications. I didn't want any child to be left behind, so I let them all in, around 80 children. These kids were separated into four classes by age, and I taught them in my spare time," he added.

In April, he invited 28 students and teachers from Tsinghua University to visit the village's school and give lectures to the children. "I was very impressed by the children's essays during their visit. The kids wrote down their wishes to create a good life for their parents. I've seen the hope in the eyes of those who want to change their lives through education," he said.

He said that he will encourage more young people from Hong Kong to visit and work on the mainland.

"The mainland has embraced high-quality development in recent years. Though the COVID-19 epidemic brought some troubles and the nation is facing challenges from the world, we are still heading toward a bright future," he added.