What the...? I'm the Dao Ancestor?

Chen Chang'an had always thought he was just an ordinary village guardian in Nanshan Village. His daily routine was feeding the chickens, planting radishes, and driving away strange troublemakers who came around. Then one day, a beautiful woman covered in wounds rushed into the village, crying, “Master! You ran off back then without even leaving an instruction manual! Our prehistoric health insurance contributions have lapsed!” Chen Chang'an: “???” What on earth? I'm actually the Dao Ancestor?!