Dragon Kingdom.
As the name implies, it should be a place with many dragons. Su Ziyu can easily deal with ordinary dragons, but he fears encountering those extraordinary beings. The benefits of entering this world are obvious; the Dragon Blood Baptism can increase significantly. However, the drawbacks are also apparent, as anything related to dragons is rarely weak. Most adult dragons start at the legendary level, and Su Ziyu's current enhancement level is only slightly above legendary. He isn't afraid of those adult dragons but worries about those old monsters who've lived for thousands of years.
Should he play it safe?
Some abnormal dragons can challenge Divine Spirits, and facing them now is slightly overwhelming.
Accumulate strength a bit more.
If he can enter the Demigod Domain, he might be able to explore this difficult polluted plane. At the very least, a medium-pollution world won't have the situation of 'Demigods everywhere, legendaries as common as dogs'.
