Was there a enfeoffment system in Shang Dynasty? What was the relationship between Shang Dynasty and neighboring small countries?

Historically, Shang Dynasty can't be called enfeoffment system. The neighboring small countries and the most powerful merchants can only be regarded as superficial obedience and substantial independence. At the end of Shang Dynasty, the four governors didn't even have to pay tribute, which was only an unwritten tacit understanding.

So the real enfeoffment system was established in the Western Zhou Dynasty, and the relationship between them was closer. The vassal States have the obligation to pay tribute and lodge guards, which is the evolutionary version of Shang Dynasty. Of course, the development of productive forces is also destroyed by the gradual thinning of blood relationship.