Looking for an affordable gym in Nanshan

Hello friends, I'm Max.  I'm from Oregon in the USA.  I am an avid weightlifter and will be moving to shenzhen in the next couple weeks to begin my job.  I was wondering if someone knows of a decent, affordable gym in Nanshan?  Your responses are greatly appreciated, thanks! ^_^

how much do you need?

i often use the free one for swimming