Li Yufeng, 34, joined the army in 2002, and heads the SWAT team of the Heilongjiang Corps of the Chinese People's Armed Police Force. [Photo by Li Jianjun/Provided to China Daily]

He increased running practices to two or three times a day and every time he carried sandbags weighing 20 kilograms, double that of his comrades.

One month later, he became one of the fastest to complete the 5-kilometer run within 18 minutes.

During sniper training, Li developed several unique methods to focus that he created himself.

To train his ability to concentrate, every night he practiced threading needles and poking holes in tiny rice grains with a needle.

In addition, every time after target practice, he recorded the data about ballistic trajectory and weather conditions, including wind power and wind direction.

With the analysis of this data in his six notebooks, he learned the different rules of ballistic trajectory in different seasons, which greatly improved his shooting skills.

Due to his excellent performance, he received numerous honors and competition prizes.