### Chinese: 2.买家急需产品或有时效限制，建议选择顺风快递，建议到付，顺丰相对有所保证，修改运费后再付款。
### English: 2. Buyers urgently need products or time limits, it is recommended to choose Downwind Express, it is recommended to pay, SF <v>is relatively guaranteed</v>, modify the freight and then pay.

### Improved English: 2. It is recommended to choose SF-express delivery with payment upon arrival for buyers who need the products urgently or need to receive it within a time range; SF is relatively secure and you may pay after the shipping fee is edited.
