Art emanates from life, and so does medicine.
When Chen Cang was performing the Long Bear surgeries in the virtual space, he kept thinking about something.
That was changing the inner tube of a bicycle!
During his university days, the hospital where Chen Cang interned was quite far from his dormitory, so he had to cycle to work every day, and there was an old man who fixed bicycles near the hospital entrance.
The old man had an amazing skill for changing inner tubes, which was universally acknowledged to be strong!
Typical craftsmen would first remove the wheel, then replace the old inner tube with a new one, doing everything step by step, which took about twenty minutes to half an hour. But when the old man changed inner tubes, he neither removed the wheels nor the outer tires; he simply lifted the wheel hub off the fork a little to create a gap through which he could easily exchange the inner tubes.