7 10 100。 Official website shows that the postcode of Xi Chang 'an District People's Government and Xi Chang 'an District Talent Exchange Service Center is 7 10 100. Xi Chang 'an Talent Exchange Service Center's institutional functions include graduate registration, personnel agency, professional title evaluation, mobile party member management, college students' entrepreneurial loans, social security for flexible employees, medical care, social security for college students and village officials, social security for restructured employees (hostels, feed stations, audit offices, etc.), retirement procedures for flexible employees, social security subsidies, employment internships, employment unemployment registration certificates, affordable housing and price-limited commercial housing.