The imperial examinations did not significantly shift recruitment selection in practice during the Sui dynasty. Schools at the capital still produced students for appointment. Inheritance of official status was also still practiced. Men of the merchant and artisan classes were still barred from officialdom. However the reign of Emperor Wen of Sui did see much greater expansion of government authority over officials. Under Emperor Wen, all officials down to the district level had to be appointed by the Department of State Affairs in the capital and were subjected to annual merit rating evaluations. Regional Inspectors and District Magistrates had to be transferred every three years and their subordinates every four years. They were not allowed to bring their parents or adult children with them upon reassignment of territorial administration. The Sui did not establish any hereditary kingdoms or marquisates of the Han sort. To compensate, nobles were given substantial stipends and staff. Aristocratic officials were ranked based on their pedigree with distinctions such as "high expectations", "pure", and "impure" so that they could be awarded offices appropriately.