[Ding, you have rewarded your disciple Lu Qinglian with a "Void Fruit," but the return reward for the apprenticeship has failed.]
[Ding, you have rewarded your disciple Ning Qianqian with a "Void Fruit," but the return reward for the apprenticeship has failed.]
[Ding, you have rewarded your disciple Chen Yi with a "Void Fruit," but the return reward for the apprenticeship has failed.]
…
Lu Changsheng continuously rewarded sixty Void Fruits, and all of them resulted in a failed return.
To reward Void Fruit, a billion-fold return must be triggered to return an Origin Dao Fruit, so the success rate is extremely low.
From the continuous failures, it can be seen that rewarding Void Fruit either results in an Origin Dao Fruit or nothing at all; there are only two possibilities.