The Only Immortal Cultivator in the Tang Dynasty

"Cao Yishui", a good young man from the 21st century, occasionally obtains the system! He started his journey of cultivating immortality and finally broke through the tribulation period before the age of 80. After the tribulation, he found that his family was long gone. Who would know what he would do? After half a year of recuperation, he unexpectedly traveled to the Tang Dynasty? ? Open a shop, accept a disciple, marry a princess? Isn't it just over a thousand years ago? I can afford to wait!