Mei is born with hearing disability and could speak after undergoing cochlear implant surgery. [Photo/ provided to chinadaily.com.cn]

"Of course, he'd rush to if faced with this scenario. He's very kind and willing to help others. He is the provincial-level excellent teacher and we have recommended him as the city's 'Teachers of the Year' in June," he said.

Peng Ana, Xiao's wife, added she has always viewed her husband as a "hero".

"He is always my hero in my mind," she said.

"This is not his first time to save another person's life."

Peng said Xiao also helped a young girl refrain from committing suicide on a traffic rolling viaduct, with his positive attitude and patience, in 2003.

Li Bing, a physics teacher at the No 3 Senior High School quoted in the Heilongjiang Morning Post, also said a human being's arms could normally stand 45 kilograms of weight. However, the girl weighed about 20 kilograms, and when she fell from the third floor of a building, she would have weighed about 75 kilograms of instantaneous force.

"Such a good deed is a ray of sunshine that warms and encourages us," posted one netizen.

"He is really the most beautiful teacher in the city and I believe virtue will be rewarded."