In the past, it took 8 hours for the toy factory to produce 1200 dolls. After the technical reform, it took only 6 hours, and the working time was shortened by several percent

One day or eight hours
Eight hours is 1200
Now 8 hours is 1200 + 300 = 1500
It seems that it is not the shortening of working hours, but the increase of surplus value

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