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_name_98 (hanyu_pinyin VARCHAR, gdp_2011__billion_yuan_ VARCHAR, regional_population_2010_ VARCHAR)

### Question ###
Which Hanyu Pinyin has a GDP in 2011 larger than 688.02 billion yuan and a regional population of 8,700,400 in 2010?

### Accurate SQL ###

SELECT hanyu_pinyin FROM table_name_98 WHERE gdp_2011__billion_yuan_ > 688.02 AND regional_population_2010_ = "8,700,400"