Shang royal tombs such as Fu Hao's had been single pits, often of great depth.  The layout of the tomb of the Marquis Yi, however, attempts to approximate his living quarters as they had been during his lifetime.  It has several chambers, and objects are arranged in them as they would be in real life.  A tomb is now thought of as an eternal dwelling for the soul.  There will be more multi-chambered tombs in the Han dynasty, but the tomb of the Marquis Yi is one of the earliest known attempts to re-create a palace.