A wise man once said: When all possibilities have been ruled out, the remaining one, no matter how incredible, must be the only truth!
So, when the Evil Corpse claimed that his suffering of Heavenly Retribution had nothing to do with his oath, although it seemed unbelievable, since all other possibilities were eliminated, the other Quasi-Saints almost believed his explanation.
Now, Jiang Liu's situation is quite similar.
The descent of Heavenly Retribution made Jiang Liu understand that the Hongmeng Purple Qi must be on himself. However, after trying everything to find its trace, Jiang Liu concluded that the Hongmeng Purple Qi becoming his game system should be the greatest possibility!
After considering it for a while, Jiang Liu set aside this thought and decided not to delve further.
If the Hongmeng Purple Qi truly transformed into the system, he needn't worry; he could wait until he reaches level 100 to address it!