What does the tortoise that Liu Bei shook mean? After that, say good luck.

Turtle divination, an ancient divination method, is not shaking. The correct way is to go through some procedures (said to be burning or other) and then look at the cracks on the tortoise shell. Non-professionals (not counting ordinary senior intellectuals) are incapable and unqualified to operate. Therefore, Liu Bei's shaking of tortoise shells should be staged to boost morale, otherwise the director is teasing someone and deliberately letting Liu Bei pretend to be 13.