Where does the phrase "a paper boat lights a candle to send a plague god" come from? What do you mean?

1. "Paper boats with bright candles to send athel loren" comes from the second book "Send athel loren" by Chairman Mao. Send the plague away with a paper burning boat and candles.

2. The whole poem is as follows.

There are thousands of willows in the spring breeze, and 6 million Chinese land is prosperous.

the red rain turns into waves at will, and the green hills deliberately turn into bridges.

The silver hoes in Tianlian and Wuling fell, and the three rivers shook with iron arms.

I'd like to ask Wen Jun where he wants to go. The paper boat burns like a candle.

3. Creative background

Sending the plague god is two seven-tone poems written by Chairman Mao on July 1, 1958, after he learned that schistosomiasis had been eliminated in yujiang county County, Jiangxi Province, and he could not sleep at night.