Even if the inspection is done properly, problems during container loading can still result in irreparable losses. Container supervision services address the critical question of ”whether this shipment has been loaded into the container completely, correctly, and safely”; they complement the inspection process and are irreplaceable. This article breaks down the complete operational process of third-party container supervision services in chronological order, consisting of six stages: on-site verification of the client’s instructions and the container’s basic conditions; inspection of the empty container’s condition after opening (cleanliness, structural integrity, and watertightness); continuous monitoring of the loading process and item-by-item quantity verification; summarizing quantities and verifying cargo stacking after loading is complete; witnessing the application of lead seals and recording seal numbers; and issuing a container supervision report containing on-site photographs and records of any anomalies. The article also explains the key differences in container supervision between full container loads (FCL) and less-than-container loads (LCL), making it a useful reference for foreign trade professionals with export shipping needs who wish to understand the standard procedures for container supervision services.