Who said "When strong, appear weak. When weak, appear strong."?

This quote is attributed to Sun Tzu.

When strong, appear weak. When weak, appear strong. - Sun Tzu

"When strong, appear weak. When weak, appear strong."

Sun Tzu

Military Strategist Chinese 544–496

"All warfare is based on deception."

"Know your enemy and know yourself."

"If you know the enemy and know yourself, you need not fear the result of a hundred battles."

"The supreme art of war is to subdue the enemy without fighting."