Which logistics is the cheapest to send heavy goods?

Postal logistics. Generally speaking, it is the cheapest to send heavy goods by postal logistics. The first charge is 3- 10 yuan, the first charge is 12 yuan/kg, and the second charge is 5 yuan/kg. ZTO Express starts at 10 yuan/kg and continues at 5-8 yuan/kg; Generally, SF Express will send the heavy parts in the province within 1kg 15 yuan, and add 2-5 yuan per kg. The starting price for the parts outside the province is generally within 1kg 18 yuan, and it will exceed 1 kg plus 6-8 yuan. Comparatively speaking, postal logistics is the cheapest.