I Haven't Even Been Born, and the Empress Wants to Propose

Lu Changsheng transmigrates to a fantasy world, becoming a baby who has yet to be born. He discovers that his family is a dominant power of the era, with an invincible background. More importantly, he awakens a sign-in System. Every time he signs in, he receives an incredible reward. Sign in at the Weiyang Heavenly Palace and receive a reward: Innate Dao Embryo. Sign in at the Little Immortal Realm and receive a reward: Immortal Scripture of Mending Heaven. Sign in at the Rock of Scattered Treasures and receive a reward: Eight Desolations Sword Embryo. As Lu Changsheng keeps signing in, he gains an Innate Dao Embryo, an unparalleled Saint Body, and an supreme Immortal Scripture before he is even born. Every sign-in also triggers astonishing phenomena that shake the three thousand great worlds. The ancestor: “My grandson, Lu Changsheng, already had the bearing of an immortal the moment he was born.” A saintess from somewhere: “Lu Changsheng, I'm willing to give up my status as a saintess. I only wish to serve you as a maid at your side.” The White-Robed Empress: “Issue my decree. Let the three thousand great worlds and the nine heavens and ten lands know that I am willing to take heaven and earth as my betrothal gifts and the Great Dao as my wedding present. I shall marry Lu Changsheng!” Lu Changsheng: “What? The empress is coming to propose? But I haven't even been born yet!”