Su Yu left Blue Star before Emperor Xin woke up.
The reason was simple: Su Yu was about to break through!
When Emperor Xin awakened, due to the Civilization Binding Technique, a massive amount of power would be fed back to him through the civilization's link.
Su Yu's strength had long been close to the peak of Planet-Class First Rank (thanks largely to being bound to the Fegg New Star Adventure Team).
With this feedback power, he would undoubtedly break through Planet-Class First Rank immediately and advance to Planet-Class Second Rank!
However, there was no way Su Yu could break through in front of Reitdoz or Lu Man.
Thus, he quickly departed from Blue Star, arriving on Mars 40 minutes later.
Present-day Mars is almost identical to Mars before the Skuru invasion. The Blue Star People have yet to develop it, so it remains barren.
But in Mars's Arctic Region, Su Yu had already set up a Spirit Concealing Array here long ago.
