Does anyone know when the bus from Yiwu Binwang Bus to Kunming departs? Do I need to book it in advance?

You can check the train numbers and departure times on this website/car.asp

Tickets before February 10th are now available for booking. I just booked it. Hope it helps. Kunming---Dali 08:30, 09:30, 10:30, 13:00, 14:00 100 yuan/person for 6 hours

Dali---Kunming is the same as above (Dali bus location: next Guancangshan Hotel)

Kunming---Lijiang 08:30 150 yuan/person 10 hours

Lijiang---Kunming 08:20 (Lijiang bus location: Lijiang Hotel)

Kunming---Gejiu 08:30, 15:00 70 yuan/person for 6 hours

Gejiu---Kunming as above (Gejiu bus location: Gejiu City New Passenger Terminal)

Kunming---Kaiyuan 09:00, 15:00 60 yuan/person for 4 hours

Gejiu---Kunming 10:00, 14:00 (take a bus from Kaiyuan Venue: Kaiyuan Terminal Hotel)

Kunming---Chuxiong 08:30, 09:30, 12:00, 14:00, 16:00, 18:00 60 yuan/person 3 hours and a half

Chuxiong---Kunming as above (Chuxiong bus location: Chuxiong Bus Terminal)

Kunming---Yuxi 08:30, 09:30, 11:30, 12: 30, 14:30, 15:30, 17:30, 18:30 30 yuan/person for 1 hour and a half

Yuxi---Kunming 09:00, 10:00, 11:00, 13: 00, 14:00, 16:00, 17:00, 18:00 (Yuxi bus location: Yuxi Bus Terminal)

Kunming---Qujing departs every hour from 08:00 to 19:00 One trip is 35 yuan/person for 2 hours

Qujing---Kunming as above (Qujing bus location: Qujing Big Turn Expressway Station)

Kunming---Xuanwei 08:30 , 09:30, 14:30, 15:30 60 yuan/person for 4 hours