the 36 ancient Chinese military strategies; the 36 stratagems
A set of ancient Chinese military tactics, often referenced in the idiom 三十六計逃げるに如かず (of the 36 strategies, retreat is the best). Used as a historical term.
He quoted the 36 stratagems to explain the importance of retreat.
Do you know the proverb 'Of the 36 stratagems, retreat is the best'?