老谋深算（老謀深算）　

◎ 老谋深算 lǎomóu-shēnsuàn

[be circumspect and farseeing;be experienced and astute;be scheming and calculating; make every move only after mature deliberation] 精明干练,考虑问题周密

这人绰号“老狐狸”,老谋深算,诡计多端,很难对付