The Lord of the Divine Dynasty Who Travels Through All Realms

The protagonist died suddenly in his sleep and accidentally obtained the system of the Gods of the Gods, so he started a new life. Should I be a villain? Still... Have you ever seen the domineering Ming army? Have you ever seen the Qin Shihuang who cultivated immortality and his dynasty? Have you ever seen Yang Guang driving a mecha to conquer Korea? Wait... When the protagonist accidentally enters the river of time, he sees a mighty and sacred figure suppressing the entrance to the foreign abyss. He seems to be called Gu Meng.