To be honest, Jiang Chen truly admires Su Tong, who was formerly known as Su Hong. Su Hong's talent was undoubtedly the leading presence among the younger generation on Dongyan Island. If not for Jiang Chen being an anomaly, Su Hong would have been the undisputed number one.
Most importantly, for Su Hong to escape from Dongyan Island speaks volumes about his fortune. Of course, luck is not the only reason he managed to escape.
Judgment, situational wisdom, various survival techniques, and personal strength—all these factors were indispensable.
Su Hong happens to possess all these qualities, allowing him to become the lucky one.
Thus, Jiang Chen is very optimistic about Su Hong. What he lacks is opportunity, and Jiang Chen wonders why Su Hong ended up on An Yun Island, probably due to being cornered at the time, with no other choice.