CREATE TABLE table_28180840_15 (hometown VARCHAR2, name_name_of_act VARCHAR2)

What is the name of the zhou jinsong's hometown?
SELECT hometown FROM table_28180840_15 WHERE name_name_of_act = "Zhou Jinsong"
SELECT "hometown" FROM "table_28180840_15" WHERE "Zhou Jinsong" = "name_name_of_act"