Hi maura,

For sending a 20-30 kg parcel from Shanghai to Wuhan via China Post, the cost is calculated based on a "first weight + additional weight" system. For heavy parcels (over 20 kg), this typically costs between ¥50 and ¥100 total.

Here is the estimated breakdown based on current pricing for the Shanghai-Wuhan route:

Weight Estimated Total Cost (RMB)
20 kg ¥35 - ¥60
25 kg ¥50 - ¥85
30 kg ¥60 - ¥110
Important notes:

First weight & additional weight: Generally, the first 20 kg costs ¥18-¥30, with each additional kg costing ¥2-¥5.

Volumetric weight: If your parcel is large but light (e.g., a big box of foam), China Post charges by "volumetric weight" (L×W×H/6000) instead of actual weight. A large but light box could become much more expensive.

No extra fees: The above price generally does not include insurance or specialized packaging.

Good to know: For a 30 kg parcel, the price difference between providers can be significant. SF Express might charge around ¥150-¥200, while Deppon or Aneng (lesser-known freight companies) could be cheaper than China Post, around ¥40-¥80.

To get an exact price at the post office:
Just tell the clerk: "我要寄一个三十公斤的包裹从上海到武汉" (Wǒ yào jì yī gè sānshí gōngjīn de bāoguǒ cóng Shànghǎi dào Wǔhàn).