Specifically, the country of origin code starting with "K" indicates that the container was produced in China. The "6" in the numerical code represents the month, which may represent June, and "1" represents the year, which may represent 200 1. Please note that the code may be interpreted in different ways, and the specific interpretation may be different due to different regions and experiences.
If you need more accurate and specific information, I suggest you directly contact Sinotrans Container Company or relevant industry associations for consultation.