Which station do I get off from Chengdu Airport to 2028 Tianfu Ave South Section, High Tech District ...Spring Downtown Hotel ?

Hi, Lucy, do you mean the Spring Downtown Hotel is located at No. 2028, Tianfu Avenue South Section or anything else?
As I know the Spring Downtown Hotel is located at No. 21.3rd section north, 2rd ring road, Jinniu District.
If you mean the hotel in Jinniu District, you can take the airport shuttle bus 300 to reach its destination at the north railway station and then change to take a taxi to reach your hotel.
If you mean the Tianfu Aveune South Section, High Tech District, you need to take the bus 303 to reach Minshan Hotel and then change to take a taxi to reach where you want to go at 10:30.

Thank you for your quick response. I am just trying to figure out would it be better if I just took the taxi from Shuangliu Airport to the Hotel

Yes, taxi would be more efficient and convenient.