Journey to the West, Dragon Palace in the East China Sea, what is the Prime Minister?

There is a poem in The Journey to the West: "A prime minister who knows many stars can always be a versatile turtle." .

Turtle, a creature, is described as obscene and timid. When in danger, it will shrink its head, be invincible first and then wait for an opportunity to fight back. Perhaps this kind of personality makes everyone feel very suitable for the temperament of civil servants. The tortoise's idea of defending and fighting back may make people think that it is smarter than the average fish, and it is not unusual to mix with the prime minister. There is another reason: people live long and are elders.