How many  year locations are there for the womens doubles in jing junhong li jiawei?
CREATE TABLE "japan_open" (
  "year_location" text,
  "mens_singles" text,
  "womens_singles" text,
  "mens_doubles" text,
  "womens_doubles" text
);
SELECT COUNT("year_location") FROM "japan_open" WHERE "womens_doubles"='Jing Junhong Li Jiawei';