Li Ping'an was at the carpenter's house at this time, and half a month has passed since he proposed the concept of the bicycle, and the two craftsmen are very interested, and in addition to helping Li Ping'an build tools for squeezing cane juice, they spend almost all their free time studying the drawings of the bicycle.

Bikes haven't been built yet, especially chains...

"I worked hard to be well-off in ancient times" 234 The balance bike is being hit by hand, please wait a while,

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