Working abroad - state income tax filing

Anyone has foreign work experience? I will be taking up a job in China for 2 years and was advised to change residency to no income tax state like Florida prior to move, so as to avoid having to pay state income tax. Is that true even though I don't live and work in the state that I am currently a resident, I am still obligated to pay state income tax while working abroad? I am familiar with federal filing as it has foreign earn income exclusion, but clueless about state. I live in SC. Please share your experience. Thanks!