This is a couplet on both sides of Maitreya Buddha in Tanzhe Temple in Beijing: a big belly can accommodate things that are difficult to accommodate in the world; Open your mouth and laugh at the ridiculous people in the world.
There is no test from who.
This is a couplet describing Maitreya Buddha.
The image of Maitreya is a big belly and often laughs.
In other words, he has a broad mind.
There is nothing in the world that he can't tolerate.