At 7 o’clock in the morning, on the third floor of an old residential area in Chaoyang District, Beijing, 72 year old Li Jianguo leaned against the wall and cautiously walked over the threshold of the bathroom.

Magnetic Thread Disc

He repeated this action for twenty years, but since his knee surgery three years ago, every leap has been like an adventure.

The building he is in was built in 1989 and has no elevator.

The bathroom is only 2 square meters and the floor is covered with polished tiles.

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