 In 639, Emperor Taizong made Fang a senior advisor to Li Chengqian, ordering him to bow to Fang as he would to Emperor Taizong.However, Fang was humble and never gave the Crown Prince any opportunity to bow to him, an act of humility which was praised.By this point, Fang's children were also highly honored, and his second son Fang Yi'ai (房遺愛) married Emperor Taizong's daughter Princess Gaoyang, while his daughter married Emperor Taizong's brother Li Yuanjia (李元嘉) the Prince of Han.