The author's job is to engage in scientific research, and writing is only part-time, and he has to end some projects at the end of the year, which is very busy.

In a few days, the third watch will be restored, and the fifth watch will be restored step by step.

8 a.m. and 5 p.m., one shift each.

"The Industrial Revolution of the Ming Dynasty" is temporarily two changes, you forgive me is playing in your hands, please wait a while,

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