1. People who are not good themselves are not suitable to be matchmakers.
Including the newly widowed and the newly divorced.
2. People with low fortune are not suitable to be matchmakers.
Investment loss, accident (such as a car accident).
People who are in poor health are not suitable to be matchmakers.
I was recently hospitalized and had an operation.
4. A person who has failed many times as a matchmaker is not fit to be a matchmaker.
If the couple after matchmaking have a big family dispute after marriage, they will often make a scene and even divorce.