Name the number of pinyin where simplified is 河西区
CREATE TABLE table_1638437_2 (pinyin VARCHAR, simplified VARCHAR)
SELECT COUNT(pinyin) FROM table_1638437_2 WHERE simplified = "河西区"
### Context: CREATE TABLE table_1638437_2 (pinyin VARCHAR, simplified VARCHAR) ### Question: Name the number of pinyin where simplified is 河西区 ### Answer: SELECT COUNT(pinyin) FROM table_1638437_2 WHERE simplified = "河西区"