Which one is safer, postal express or SF express?

Postal express delivery is safer.

China Postal Express Logistics Co., Ltd. Approved by the State Council, it is a state-owned joint-stock company jointly established by China Post Group and provincial postal companies in June 2010. EMS is divided into two types: air transportation and land transportation. There are various postal methods, which are convenient and fast. The first weight of business is 20 yuan. In September 2012, postal EMS e-commerce parcels in some cities started to charge 8 yuan, and the charges were lowered.

Transportation type:

EMS is divided into two types: air transportation and land transportation. Air EMS, the time limit is the next day for big cities, 2 days for rural or remote cities, and 2 days for rural areas in remote cities. In order to arrive on the 3rd, the express delivery form is marked with the words "Domestic Standard Express" in the upper right corner (domestic standard express delivery is also available in this province, but not by air).

The time limit for land transportation EMS is 2 days for cities in neighboring provinces, 4 days for remote cities, 3 days for general cities, and 1-2 days for rural areas to arrive later than the above time. The corner is marked with the words "Domestic Economic Express".

Reference for the above content? Baidu Encyclopedia - Postal Express