I Am the King of Zhenbei! Border Check-In for Thirty Years

Travel through the world of high martial arts and inherit the title of King of Zhenbei. Fang Xiu originally thought that he would be rich and prosperous, and enjoy it endlessly. But he didn't expect that he would be jealous of the emperor and be sent to the dangerous border with constant wars. Fortunately, the sign-in system is awakened at this time, and you can get rewards by signing in anywhere. "Sign in at Zhenbei City and get the reward [Supreme Bone]" "Sign in at the Refusal Gate and get the reward [Demon Suppression Tower]" "Sign in at Langjuxu Mountain and get the reward [Eighteen Riders of Yanyun]" ... Therefore, Fang Xiu adhered to the principle of "fighting until the end" and signed silently for thirty years. Until one day. A desert barbarian country, invaded by the whole country, and spread bloodshed for three thousand miles! At a time when hundreds of millions of Chinese people are in despair. Fang Xiu was born out of nowhere, and his sword frost-frozen fourteen states!