Don't hesitate to do things, and try to find old acquaintances from the tendon. If the mouse and the cow meet one day, please hurry up the ladder! Signature: Yuntou sends the children. What do you mean?

Specifically, "seeking old knowledge in Tianjin" means finding familiar people or things as soon as possible, which can refer to people who have helped themselves in the past or people who are familiar with a certain field or industry. This will help you understand the situation faster and avoid detours.

"If you meet rats and cows on the day of the meeting, hurry up the ladder" is a congratulatory message, which means that if you meet the right time, just like people who belong to rats and cows meet at the same time, good luck will come and people will succeed immediately.

Generally speaking, the meaning of this sentence is to encourage people to do things without hesitation, to seize the opportunity and actively seek help in order to succeed.