Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_12275654_1 (year VARCHAR, mens_singles VARCHAR, womens_singles VARCHAR)

### Question ###
How many times did Niels Christian Kaldau win the men's single and Pi Hongyan win the women's single in the same year?

### Accurate SQL ###

SELECT COUNT(year) FROM table_12275654_1 WHERE mens_singles = "Niels Christian Kaldau" AND womens_singles = "Pi Hongyan"