Isn't xianjian 4 a hundred years old? Where is the magic sword?

..... I am here to supplement and correct Phyl's answer, hoping to help you. ...

Details are as follows:

Fairy 4 happened more than 300 years before Fairy 3, when Xiao Kui Jiang Guo had perished, Xiao Kui had been in the magic sword for more than 700 years, and Jingyang, the ancestor of Jing Tian, also appeared in Fairy 4. ..... This is official information, which means that the first few hundred years are 300 years, not 100 years. ...

..... Jingyang is Jing Tian's grandfather, which is beyond doubt, because in the game, Jingyang mentioned subsidizing his own yarn, and some people made fortune-telling predictions. There will be a rich man in the third generation of Shu, that is, Jing Tian in Xianjian No.3 Middle School ... Although it is a bit exaggerated to say that three generations have been passed down in three hundred years, it may be the negligence of the official plot setting, so the landlord can regard this plot as a loophole. ...

..... As for the question of the magic sword ... It should be clear to anyone who has played the four subplots of Xianjian that Ziying met Xiao Kui in Butoushan, but because of his rage, Ziying said that he would take him to a safe place to avoid civil disputes, so he took him to the sword burial. It was not until Ziying died that the magic sword entered the Jianghu again. After a storm, it was recovered by three generations of elders in Shushan and locked in the demon tower. ...

..... and the succession of the elders of Shushan, judging from the succession of the 23rd generation of Changqing, 24th generation of Changhao, 25th generation of Jiang Qing and 26th generation of Yu Yun, due to the fluctuation of the regime of Shushan, the handover interval between them is only about one year, so it is entirely possible for the elders to inherit19th generation for 300 years. ...

..... The above is my explanation based on official data, and I hope it will help you ... = _ =