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_66 (number_of_clubs INTEGER, fourth_placed VARCHAR, season VARCHAR)

### Question ###
What is the number of clubs before 2003 with a 4th place winner of Shenzhen Jianlibao?

### Accurate SQL ###

SELECT AVG(number_of_clubs) FROM table_name_66 WHERE fourth_placed = "shenzhen jianlibao" AND season < 2003