Because Han Sen could not provide the geno armor, he was unable to strike a deal with God's Retribution.
But Han Sen wasn't expecting anyone to help him in the first place. He might be in danger in the Alliance, but he didn't think God's Organization could bring him any harm in the Fourth God's Sanctuary.
After sending God's Retribution away, Han Sen returned to the Alliance. Then, he allowed Zero to follow him back into the sanctuary.
When Zero entered the sanctuary, she appeared next to him. Han Sen told her to look after the shelter in his absence, and if anything awry occurred, to contact him as soon as possible.
"How do I call Dad and tell him not to generate a geno armor?" Han Sen thought to himself. Unfortunately, he was unable to come up with a solution.
To prevent God's Organization from finding him, Han Yufei did not leave a way for Han Sen to contact him.