The Lin Family ancestor had been trying to avoid that since he knew that if he told Lin Fan about this story, Lin Fan would definitely chase after in revenge, but that was too dangerous for him since these were true upper realm factions.
The power that they had behind them was not something that Lin Fan could take on right now with his current power.
But he had no choice since the Lin Family ancestor still had to win Lin Fan over, so he couldn't withhold information from him like this if he wanted him to trust him.
In the end, it was all his fault since he had gone into closed door cultivation all this time, not paying attention to this matter. If he had learned of Lin Fan's abilities sooner, he would have been able to bring him back to the Lin Family much sooner than this.