Let me laugh

Jiang Changsheng was reincarnated as the crown prince of the Jing Kingdom. However, he was switched at birth and was sent to grow up in a temple. He was raised as a Taoist.
The change in his fate was devastating. Fortunately, he was able to awaken the Survival System and gained the power to not die from aging. Every time he survived a dangerous event, he could receive rewards.
His senior brother almost killed him by accident. He was lucky enough to survive that and was rewarded with the Divine Shadow Kick.
He almost got crushed when the ceiling fell on top of him during an earthquake. He was able to obtain the Nine Seeking Divine Dragon Step.
After surviving the demon invasion, he was rewarded with the magic treasure, Demon Subduing Mace.
This was a world where kingdoms stood tall, demons rampaged in the wild, martial arts ruled the street, and where Gods did not exist.
300 years had passed.
The Jing Kingdom was starting to fall. The dukes came together and made the emperor their puppet. The kingdom was divided. After decades of internal conflicts, the kingdom was on the verge of being invaded. The citizens were pretty much living in hell.
The puppet king, Jiang Xuanzhen, arrived at the temple and begged, “Ancestor, I apologize for being weak! Please! Help us regain our glory!”

My Descendant Begged Me To Help Him Just After I Became A God

Jiang Xiu also noticed the change in Jiang Jian. This kid could already wield the halberd. How long had it been?

Jiang Changsheng smiled and said, "How is it? Are you happy? If you ascend the throne in the future, you will at least have someone you can use."

His words dispelled Jiang Xiu's worries.

Jiang Xiu's eyes lit up when he heard that. That's right. Ping'an was the number one general under his father. When he ascended the throne, he reckoned that Ping'an should rest. Moreover, he had to support his own forces.

After Jiang Changsheng enlightened him, Jiang Xiu looked at Jiang Jian with a burning gaze.

He seemed to see the number one general of Great Jing in the future appearing before his eyes.

Which Dynasty Will Never Die?