There is no price break in China Post SAL kilo shipments from Kunming.
My shipments vary from 1-2.5kg. The heaviest 2.5kg/210y while the
lightest 1.2kg/110y with everything else proportional in between which
is 10 shipments so far. The various shipping weights are distributed
and not clustered. The number 1kg/100y from Kunming seems to be a good
estimate to where I live in the US. There may be some break but not
before 2.5kg. You need to look at the postage on your shipments. I
also don't expect the same rates from Shanghai which remains to be
seen. The actual shipping cost is a function of shipping distance,
location and connections. You don't know till you see the package.

Jim

Mike Petro wrote:
> Always try to negotiate to pay ACTUAL shipping costs. Limiting
> yourself to 1 kg packages is the MOST expensive way to ship if you are
> paying actual China Post rates. The reason is that the FIRST kg is
> more expensive than subsequent kgs. The following examples come
> directly from China Post shipping tables:
>
> to ship 5kg of tea
>
> Surface:
> 1st kg - $12.27 each additional KG = $2.47
> to Ship five 1kg packages would cost you $61.35
> to Ship one 5kg package only costs $24.74
> you save 60% by shipping only once!
>
> SAL:
> 1st kg - $13.98 each additional KG = $6.43
> to Ship five 1kg packages would cost you $69.90
> to Ship one 5kg package costs $46.13
> you save 34% by shipping only once!
>
> Air:
> 1st kg - $20.28 each additional KG = $11.75
> to Ship five 1kg packages would cost you $101.40
> to Ship one 5kg package costs $78.16
> you save 23% by shipping only once!