Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_28138035_6 (womens_doubles VARCHAR, womens_singles VARCHAR, mens_singles VARCHAR)
### Question:
How many times did  li ju win the womens singles and wang liqin win the mens singles?
### Answer:
SELECT COUNT(womens_doubles) FROM table_28138035_6 WHERE womens_singles = "Li Ju" AND mens_singles = "Wang Liqin"