Not the grain transport envoy, but the transport envoy, or Cao Chen and Cao Si, but in fact the transport envoy not only manages the grain transport, but also manages the state finances, so it is speculated that he should be a local finance official now.

The transshipment department, originally a temporary organization, became a formal organization in Song Taizong. Sir, it's a transportation agent. The full name of the transshipment ambassador is "a certain state waterway metering transshipment ambassador". If you have more than two jobs and a higher official position, you are said to be a transshipment ambassador. The deputy director has a transfer assistant and a transfer judge. Responsible for the finance and water transportation of one or more roads. The transshipment ambassador is commonly known as "Cao Chen" and the official department is commonly known as "Cao Si".