Which station is from China and has a frequency of 684khz?
CREATE TABLE table_64209 (
    "Frequency" text,
    "Station" text,
    "Operator" text,
    "Country of origin" text,
    "Transmitter location" text,
    "Format" text
)
SELECT "Station" FROM table_64209 WHERE "Country of origin" = 'china' AND "Frequency" = '684khz'
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: Which station is from China and has a frequency of 684khz? ### Input: CREATE TABLE table_64209 (
    "Frequency" text,
    "Station" text,
    "Operator" text,
    "Country of origin" text,
    "Transmitter location" text,
    "Format" text
) ### Response: SELECT "Station" FROM table_64209 WHERE "Country of origin" = 'china' AND "Frequency" = '684khz'