There is a process called kiln transformation,
there is a kind of red called: lang hong,
There is also an old saying: "If you want to burn Lang Hong in poverty"

Why do you say "want to be poor, burn lang red"?
There is a popular folk saying about Lang Yao Hong: If you want to be poor, burn Lang Hong.
In fact, the meaning of this sentence is that Lang kiln red is too difficult to burn, and it fails again and again, often ending in bankruptcy.
But even if it is so difficult to burn Lang Hong, there are still people who insist on firing. Because it's so beautiful that you can't move your eyes!