Selected Works of Chairman Mao, Volume IV, page 134.

The sentence about red envelopes on the Internet is pure fiction. The fourth volume starts from page 1 123, and there is no page 134 at all. I checked the Selected Works of Mao Zedong by the Central Institute of Party History Literature, and there are no relevant sentences on page 138+034, so there is no picture or truth. See the picture below for the original text.