" The Prince signed up for 100,000 Steel Cavalry at the beginning of the game " was a novel, but the search results provided did not provide any information about free reading. Therefore, it was uncertain whether the novel could be read for free.

The book about signing in 100,000 Nether Cavalry at the start of the game was a novel by Su Yuan and Zhou Shu. This novel described the plot where the protagonist successfully summoned 100,000 Western Liang cavalry. The content of the novel was full of high-level and classic descriptions. The author had spent a lot of words on the character descriptions, which were delicate and sincere. However, the specific plot and story development were not mentioned in the search results provided.
Crossing the Purple River at the beginning to sign for 100,000 was a Xianxia novel. It described the protagonist's ability to obtain 100,000 Snowy Dragon Riders at the beginning. The specific plot and story development required reading the contents of the novel.
The Prince of Beiliang signed Three Thousand Shadows at the beginning of the game. It was a novel written by Yiyun Yuanshang. After Dugu Yun became the heir of the Prince of Beiliang, he faced all kinds of assassinations. The check-in system was activated and he received the support of a series of organizations and forces. However, the specific plot and plot development could only be understood by reading novels.
The beginning of the game was a fantasy novel written by Yue Yue. The story was about Lu Yu, who was looked down upon by his family. When Hongyan was captured, he awakened the check-in system. By signing in on different battlefields, he had gained the loyalty of the Eighteen Cavalry of Yanyun, Luo Cheng, and the black-armored army. However, we are unable to provide any more information about the novel.
" Fantasy: Sign In at the Beginning of the Game, Eighteen Knights of Yanyun " was a fantasy novel written by the author, Yue Yue. The story was about the protagonist, Lu Yu, who became the beacon guard of the Beacon Tower and awakened the check-in system when he was looked down upon by his family. By signing in on the battlefield, he had gained the loyalty of the Eighteen Cavalry of Yanyun, Luo Cheng, and the black-armored army. The specific plot and chapter content could be read in the search results provided.
" Sign in for 100 Trillion at the Beginning " was a martial arts cultivation novel created by a writer. Su Ling transmigrated and obtained the check-in system. On her first check-in, she received 100 coffins, including copper, iron, gold, golden nanmu, and those that were surrounded by immortal and demonic energy. Opening these coffins could obtain various rewards, such as successfully opening the Blood Demon Coffin to obtain the Blood Demon Technique, Blood Demon Crystal, and so on. Book-chasing Network provided the latest chapters of the novel.
At present, there was no specific information about the online novel named "The Prince of the Opening Sign in to be Invincible". However, judging from the concept of the " check-in flow " and the " invincible flow ", the protagonist of the " check-in flow " achieved a counterattack by signing in to obtain rewards, while the protagonist of the " invincible flow " had super strength to easily deal with challenges. If there was a web novel about the " Prince's Invincibility at the Beginning ", it might be a story about the protagonist using the check-in system to continuously obtain rewards such as increasing his strength and obtaining resources, gradually becoming invincible. This kind of setting combined the characteristics of the check-in flow and the invincible flow, which could attract readers who pursued an easy counterattack and a powerful protagonist halo plot.
Unfortunately, based on the information provided, it was impossible to determine the exact title of the book.
In online novels, many protagonists had golden finger settings related to signing in at the beginning of the game, including the plot of signing in to the Hundred Billion Corporation. For example, in the game "Sign in to the Hundred Billion Corporation at the beginning of the game", the main character was reborn in the reincarnation space. Not only was he familiar with the dungeon plot, but he was also bound to the check-in system. He was rewarded with 99 reincarnations at the beginning of the game. In some other urban novels, the setting of signing in to obtain huge wealth (such as a hundred billion corporation) was often an important plot that pushed the protagonist to the peak of his life. It allowed the protagonist to quickly obtain powerful economic strength, and then in the story, various plots of face-slapping counterattack and enjoyment of life were launched. These works were mostly to satisfy the readers 'fantasies. The plot usually revolved around how the protagonist used this huge wealth to gain an advantage in various scenarios.
Great Qin's 1,000-year Cultivation was a fantasy novel. It described how the main character, Lu Chen, had obtained a system after transmigrating to a fantasy world. Every time he signed in, he would receive 1,000-year Cultivation and other rewards. The plot of this novel was full of ups and downs and was exciting. It was a novel with excellent plot and writing style. The specific storyline and plot details were not mentioned in the search results.