The two are at the same level, both are at the level of a department (because Xi'an is a sub-provincial level), the director of the office of the district party committee, usually into the Standing Committee, while the deputy mayor into the Standing Committee of the minority, so the ranking, the director of the office of the district party committee than the deputy mayor of the district, but if the deputy mayor also into the Standing Committee, then the deputy may be slightly larger. But usually the director of the district party committee office is bigger than the deputy district governor.