Thank you for choosing healthcaremagic. I would like to have more information about your relatives condition to address your question in detail. If it is a recent stroke
I advise him to get physiotherapy
regularly for speedy recovery. Tai Chi is nothing but another from of physiotherapy. But normal physiotherapy is proved to be beneficial in stroke cases and is being practiced for years together. So I advise your relative to get regular physiotherapy. Visit a neurophysician in your locality for detailed treatment options available to him.