How many years did lin gaoyuan wu jiaji play mens doubles?
CREATE TABLE table_28138035_20 (
    year_location VARCHAR,
    mens_doubles VARCHAR
)
SELECT COUNT(year_location) FROM table_28138035_20 WHERE mens_doubles = "Lin Gaoyuan Wu Jiaji"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many years did lin gaoyuan wu jiaji play mens doubles? ### Input: CREATE TABLE table_28138035_20 (
    year_location VARCHAR,
    mens_doubles VARCHAR
) ### Response: SELECT COUNT(year_location) FROM table_28138035_20 WHERE mens_doubles = "Lin Gaoyuan Wu Jiaji"