Today, I went to Kunming Eastern Bus Terminal whereby you can take the coach to Hekou.
Below is the Google Map link : ttp://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=longchi,+kunming,+yunnan&sll=25.025884,102.724915&sspn=0.226474,0.441513&ie=UTF8&hq=longchi,&hnear=Kunming,+Yunnan,+China&ll=25.037404,102.785275&spn=0.003538,0.006899&z=17
Take care all!
Regards,
Steve