Multiple entry tourist visa - help!

Hi there!
I'm planning on travelling Asia for a year starting in August - I want to travel around Asia for forty days and then leave with plans to return to China later on in the year. For a multiple-entry tourist L, do I need confirmation of all hotel/flight reservations for all intended stays for the whole year? Or, can I show proof of the forty day visit and still get the multiple entry visa? Hope that makes sense!!!

Thanks :)