Medical Equipment

I will be traveling on several domestic flights while in China. I have my CPAP (Continuous positive airway pressure) machine that I travel with. All flights in the United States, Domestic and International regard this as medical equipment and is not considered part of my carry on allowance. While in China I do not intend to use my device in flight but will it be considered part of my allowance? Also along with my 4kg allowance as carry on can I also have my camera bag as a personal item?