In 593, Emperor Wen put Yang Su in charge of constructing his summer palace Renshou Palace (仁壽宮, in modern Baoji, Shaanxi). Yang Su made Feng his assistant, and they constructed a magnificent palace, at much human and material cost. After the palace was completed in 595, the frugal Emperor Wen visited the palace and was initially displeased at its magnificence and human cost, rebuking Yang Su. Yang Su was fearful that Emperor Wen would punish him, but Feng correctly predicted that when Emperor Wen's wife Empress Dugu arrived at the palace, Yang Su would not only not receive punishment, but would be rewarded. That indeed happened, and when Yang Su, impressed with Feng's prediction, asked him the reason, Feng responded: