CREATE TABLE table_28138035_20 (year_location VARCHAR, womens_doubles VARCHAR)

How many year locations are there for the womens doubles in jing junhong li jiawei?
SELECT COUNT(year_location) FROM table_28138035_20 WHERE womens_doubles = "Jing Junhong Li Jiawei"
SELECT COUNT("year_location") FROM "table_28138035_20" WHERE "Jing Junhong Li Jiawei" = "womens_doubles"