Compare with China Post Rate

China rates start from the initial 100g (0.1kg) being a certain amount, and then differing amounts for each 100g thereafter. We can compare the China Postal Service and China Post’s Small Parcel Service.

(注：原句已经是英文，如果目的是优化或调整语句使其更通顺，可以稍作修改。例如：)

China's postal rates start with a certain fee for the initial 100g (0.1kg), followed by additional fees for each subsequent 100g increment. We can compare the pricing of China's Postal Service with China Post’s Small Parcel Service.