Traveling to Yunnan from Guangzhou city

My Name is Murtaza , I’m from Pakistan , and next month I will come Guangzhou for attend Canton Fair . After attend canton fair I want travel to Yunnan with my one friend, I want see some beautiful place of Yunnan for 5 days.
I want start traveling to Yunnan from Guangzhou city; kindly advise me which is the best and cheapest way to go travel Yunnan.
Also inform us any good travel agency in Guangzhou city for group traveling to Yunnan. Need By Air and by Train both information.
I shall be very thanks full to you.
Kind Regards
Murtaza