This was the Chaos Treasures' reward to him, thanking Jiang Chen for the efforts he had made toward their restoration.
Of course, there is no definitive answer to such matters, how one interprets it is up to them, it all depends on one's own heart.
As for whether it was fate's favor, or a reward for one's own efforts, only the legendary Great Dao would know.
Jiang Chen wouldn't think that everything he was experiencing was a calculation by the Great Dao. How much wine had he drunk for him to be intoxicated like this? What level of existence was the Dao that it would scheme against him? He shouldn't flatter himself.
...
Swish~~
Jiang Chen stretched out his hands, and a flash of chaotic light passed, and in each of his hands there appeared a treasure, the Dao Mirror and the Chaos Green Lotus.