Where is Wujiapo now?

Wu Jiapo's name appeared in the Beijing Opera "A Fierce Horse with Red Bristle". However, because this story is fictional, there has never been such a thing in history, and there have never been people like Xue Pinggui and Wang Baochuan. Therefore, it is unknown whether there is a place called Wujiapo, and it is estimated that no one has verified it. However, according to the lyrics and chanting in the play, it can be judged that Wu Jiapo mentioned in the play should be in the present Shaanxi Province, near xi 'an. But where exactly? Because the name Wujiapo is fictitious, there can be no correct answer.