What is the GDP and population of Nanjing （Jiangsu）?
SELECT distinct t1.gdp ,  t1.Regional_Population FROM city AS T1 JOIN hosting_city AS T2 ON T1.city_id   =   T2.host_city where t1.city  =  'Nanjing  (  Jiangsu  ) '
GDP refers to gdp; population refers to Regional_Population; Nanjing (Jiangsu) refers to filtering condition city = 'Nanjing ( Jiangsu )';