transit in Shanghai twice

I'm planing for a holiday in Korea but to get there I have a 35 hour layover in Shanghai, China as well as a 25 hour layover going back to Abu Dhabi. I am a Filipino national working in Abu Dhabi with valid resident visa. I don't know what tpye to apply for. Single entry? Double entry or transit one for my layovers, I want to use my time to go around the city. Please advise ,e what to do.,