Dānlín's tattoo "LD" is the abbreviation of Dānlín's name, and it is also the brand symbol signed by Dānlín. In the second position, the five stars are in a row, representing that Dānlín once won the Grand Slam honor. The third "FF" is Fang Fang's pinyin abbreviation, which is the nickname of Dānlín's beloved wife. In the fourth cross pattern, Dānlín had a very good relationship with his grandmother since childhood. Her grandmother was a Christian, so Dānlín carved a cross on her arm. The fifth English sentence "until the end of the world" means that you can play badminton for a long time and grow old with your wife.
Perhaps it is because Dānlín is the "first brother" of China badminton, bearing the honor and expectation of countless people, so the army is not very strict with him.