lacking virtues and abilities, promoting those who are capable and virtuous, hating evil, and liking righteousness, this is my strength compared to the gentlemen here. Emperor Taizong agreed strongly, and those present also agreed this as fair analysis. Wang further advocated ruling the state by Confucian principles, a position that Emperor Taizong agreed with. Soon, Emperor Taizong upgraded his title to duke. In 633, Wang was accused of leaking state secrets, and he was demoted to the post of prefect of Tong Prefecture (同州, roughly modern Weinan, Shaanxi). In 634, Emperor Taizong recalled him to be the minister of ceremonies. In 637, he finished compiling a work on proper ceremonies, and for this contribution Emperor Taizong awarded him with silk and created one of his sons a baron. That year, he was also made the teacher of Emperor Taizong's favorite son Li Tai the Prince of Wei. By Emperor Taizong's orders, Li Tai treated Wang with honors due a teacher, and Wang also accordingly treated Li Tai as a student. Also around the time, Emperor Taizong's daughter Princess Nanping was due to marry Wang's son Wang Jingzhi (王敬直). At those times, the customs were that when a princess married into an official's household, her parents-in-law were to bow to her. Wang believed this to be improper—that princesses needed to be in their proper roles as daughters-in-law, and therefore he instead accepted bows from Princess Nanping. After this, it became customary for princesses to bow to their parents-in-law. Similarly, in 638, Wang submitted a petition pointing out that it was improper to have the high-level officials bow to imperial princes and that it should be the reverse—a suggestion that Emperor Taizong was initially offended by and resisted, but after Wei Zheng pointed out that this would reduce speculations that imperial princes would take the place of the crown prince, Emperor Taizong approved Wang's suggestion. It was said that when Wang was young and received help from others, he would not thank them. However, after he became an honored official, he sought those who had helped him in the past and repaid them greatly—and if they had died already, repaid their families. He was kind in supporting his widowed sister-in-law and his nephews, and often helped clan members who were less fortunate. However, he was also criticized for not building an ancestral temple, instead only sacrificing to the ancestors privately at home.