I am going for a trip at Kunming, is there any recommendation for transport?

Subway and city buses can be your choice. Hereunder I list the transportation to the main attractions for ur reference:
To stone forecast: you can take a regular bus from East Bus Station to the attraction directly.
To dianchi lake: take bus 24/44/73/94/135/172/223 to Haigeng Park.
To golden temple: take bus Z90/ 47/57/142 to Jindian.
To western hills: take bus 6/51/94/C70 to Gaoyao.