"The secret realm of the sky!" Yuan Tiangang frowned when he heard this.
"Master Yuan knows about that secret place?" Shen Luo asked when he saw this.
"I saw it occasionally in ancient books. It is a famous burial place for immortals. I don't know more about it." Yuan Tiangang shook his head.
"The place where immortals are buried is indeed very appropriate." Shen Luo couldn't help but think to himself.
"I will tell you two in detail about the situation there when I have time later. I came here this time to report important matters to the Duke and Master Yuan." He quickly came back to his senses and said.
"Oh, just tell me what's the matter." Yuan Tiangang waved his whisk and nodded.
"I have just returned to Chang'an City. I learned from fellow Taoist Gu that the hydrological official of the Imperial Observatory was killed and the ground veins were changed. One of the changed ground veins leads to the Yinling Mountains in the northwest of Chang'an City. I have been to an ancient tomb there. At the bottom of the tomb, there is a space passage leading to the underworld." Shen Luo stopped here. With the wisdom of Yuan Tiangang and Cheng Yaojin, there was no need for him to explain further.
Sure enough, when Cheng Yaojin heard this, his face darkened.
Yuan Tiangang's expression remained calm and he did not show any surprise.
"Could it be that Yuan Tiangang already knew about this?" Shen Luo couldn't help but wonder when he saw this.
"This is the hydrological map of the earth's veins that I just drew, as well as the results of my investigation into the case of the hydrological official of the Imperial Observatory." Gu Hualing took out the hydrological map and a jade slip and presented them to Yuan and Cheng.
Cheng Yaojin eagerly took the hydrological map and jade slips, and his expression turned grim after he glanced at them with his spiritual sense.
"Based on the situation of the previous battle, the enemy has the ability to summon underground demons. Now they have even opened up a passage connecting to the underworld. They probably want to make a comeback and summon ghosts from the underworld to attack Chang'an City again. We must find a way to stop them!" Cheng Yaojin looked at Yuan Tiangang.
"Thank you for your hard work, Fellow Daoist Gu." Yuan Tiangang was still not in a hurry. He took the geomagnetic hydrology map and the jade slip, glanced at them and then said to Gu Hualing.
Gu Hualing was stunned for a moment, then realized that Yuan Tiangang wanted her to leave.
"Then I'll take my leave first." Gu Hualing bowed slightly, glared at Shen Luo beside him, and then walked out.
Yuan Tiangang waved his sleeves, and a layer of white light flooded the hall.
"Master Yuan, is there any other hidden story behind the earth veins?" Shen Luo asked with surprise flashing in his eyes.
"This matter involves a lot of things and it's a long story. I heard that you were also there when Fangcun Mountain was attacked. Do you know the real reason why Lion Camel Ridge and Demon King Village attacked Fangcun Mountain?" Yuan Tiangang asked back, changing the subject.
"I know a little bit. It is said that it is to enter a place called the Well of Gods and Demons. The entrance is in the Bodhi Secret Realm of Fangcun Mountain." Shen Luo didn't understand why Yuan Tiangang suddenly mentioned Fangcun Mountain, but he still told the truth.
“That’s right. The Well of Gods and Demons is the hub of the spiritual and demonic energy of the Three Realms. After the ancient Battle of the Gods, all races in the Three Realms worked together to seal it. But over the years, there has never been a shortage of people who have their eyes on the Well of Gods and Demons.” Yuan Tiangang said.
"I can imagine this, but isn't the entrance to the Well of Gods and Demons in the Bodhi Secret Realm? The entrance should have been sealed after the war. What does it have to do with Chang'an City?" Shen Luo said puzzledly.