How many red envelopes can I put on the red envelope wall?

According to the density. The number of red envelopes that can be placed on the red envelope wall is determined according to the density of red envelopes. The greater the stacking density of red envelopes, the more red envelopes there are on the red envelope wall. Traditional red envelopes, also called lucky money, are money wrapped in red paper by elders for their children during the Lunar New Year. It is said that during the Ming and Qing Dynasties, most lucky money was given to children with red ropes. After the Republic of China, it evolved to be wrapped in red paper.