Taking a minor to China without their parents

I would like to take one of my students to a martial art tournament in China. He is 16 years old and will be traveling without his parents. What documents and visas etc. are needed? If he is injured at the tournament
what is needed to get him medical care? Also if any of our adults are injured at the tournament, whtat is needed for medical care? Any additonal advice is appreciated.

Thank You,

Tim Q.