From the search results provided, there was no specific information or answer about " signing in since becoming the Crown Prince ".

From the search results provided, there was no specific information or answer about " signing in since becoming the Crown Prince ". Therefore, he could not answer this question.
From the search results provided, there was no specific information or answer about " signing in since becoming the Crown Prince ". Due to the limited information provided in the search results, it was impossible to determine the name, author, or storyline of a novel. Therefore, there was no way to provide an accurate answer to the question of " signing in from the moment he became the Crown Prince."
From the search results provided, there was no specific information or answer about " signing in since becoming the Crown Prince ".
From the search results provided, there was no accurate information about " signing in since becoming the Crown Prince ", so there was no answer.
From the search results provided, there was no specific information or answer about " signing in since becoming the Crown Prince ". Therefore, he could not answer this question.
From the search results provided, there was no specific information or answer about " signing in since becoming the Crown Prince ". Therefore, he could not answer this question.
From the search results provided, there was no specific information about " signing in since becoming the Crown Prince ", so he could not answer this question.
The Heavens: Rise from the Sanctuary-realm was a novel written by Black Morning Star S. The story was about the protagonist, Roao, who accidentally obtained a 'Myriad World Pearl' that could cross the heavens and began his adventure. He first transmigrated to the high-risk world, the Coiling Dragon, and discovered that this pearl could also increase his cultivation talent, giving him a chance to become a Highgod Paragon. The world of the novel was mainly set in the context of Coiling Dragon and Devouring the Starry Sky. The following chapters might involve the Prehistoric Era or Devouring the Starry Sky. The novel has been completed and the full text is free to read online.
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We know that 'Great Tang: Self-Deposing the Crown Prince's Position at the Beginning' is a time-travel novel. The plot is full of ups and downs, and it is exciting. The story was about a 21st-century teenager who accidentally transmigrated to become the Tang Dynasty's Crown Prince, Li Chengqian. He had awakened the system and requested to depose himself as the Crown Prince, which shocked the imperial court. However, other than that, we can't know more about the specific content of this novel.