Since Adès wanted to use his power to go to war with the Nine Great Daos and make the people of the Eastern Immortal World kill each other, Chen Yu naturally had nothing to hide. Not only would he not hide, but he would make a big display of it; only by doing so could he deceive Adès.
Because this was precisely the situation Adès wanted to see. Being too cautious would instead arouse her suspicions.
Therefore, the moment Chen Yu made his move, Adès, who was in the East European continent, received the news immediately.
Chapter 1309