 Further, in order to please his mother Empress Dugu, who disfavored men who had concubines, Yang Guang, while having some concubines, pretended to have none beside Princess Xiao, and as part of his elaborate attempt to appear both filially pious and frugal, when Empress Dugu's servant girls arrived at Yang Guang's defense post at Yang Province (揚州, roughly modern Yangzhou, Jiangsu) to deliver messages to and from Empress Dugu, Yang Guang would have the servant girls stay with Princess Xiao despite their inferior status.Eventually, Emperor Wen deposed Yang Guang's older brother Yang Yong (whose faults, in his parents' eyes, were wastefulness (which displeased Emperor Wen) and having many concubines (which displeased Empress Dugu)) from his position as crown prince in 600 and created Yang Guang crown prince to replace him.Thereafter, Princess Xiao carried the title of crown princess.