Of course, Zhang Sanfeng and the Wudang faction have the strength to avenge Zhang Cuishan, but Zhang Cuishan was actually not forced to die by the five major factions such as Shaolin, Emei, and Huashan, but because he was really shameless to face Yu Daiyan, who became a waste because of Yin Susu. Zhang Sanfeng lost his beloved disciple, so he could naturally be angry with the five major factions, but he had a clear heart and would not make such a self-deception. 
Let's talk about the real reason why Zhang Cuishang committed suicide Xie Xun used the lion's roar to deafen and deaf all the people of the Eagle Sect in order to seize the dragon slaying knife, but Zhang Cuishan won Xie Xun with the calligraphy of "silver hook and iron stroke" in the gambling game, and was able to protect himself and Yin Susu. Although Xie Xun kept the agreement and did not hurt the two of them, in order to prevent revealing his whereabouts, he hijacked the two into the sea and traveled all the way north to ** Island, where he went for ten years. In getting along, Zhang Cuishan and Xie Xun had fights, but they were able to support each other most of the time. Later, Zhang Cuishan and Xie Xun married Jinlan, Zhang and Yin got married, gave birth to Zhang Wuji, and made Xie Xun Zhang Wuji's father-in-law. When Zhang Wuji was ten years old, it was Zhang Sanfeng's 100th birthday, and Zhang Cuishan and Yin Susu took him back to the Central Plains. In Wudang Mountain, the five major factions who came to congratulate Zhang Sanfeng on his birthday attacked together and asked Zhang Cuishan and his wife about Xie Xun's whereabouts. Among them, they either have a grudge against Xie Xun, or they want to seize the dragon slayer knife in the name of revenge. In the face of such a situation, the six brothers led by Song Yuanqiao expressed their oath to protect Zhang Cuishan. They thought about using the "Zhenwu Seven Interception Formation" to face the enemy, and the second Yu Lianzhou even wanted to use the "Tiger Claw Absolute Hand". The deep friendship of the brothers made Zhang Cuishan very moved. 
Unexpectedly, at this time, Yu Daiyan recognized Yin Susu as the person who injured him with a poisonous needle. Back then, Yin Susu used a poisonous needle to plot against Yu Daiyan in order to seize the dragon slaying knife, and later although she ordered someone to escort her back to Wudang Mountain, she did not prevent an accident on the road: Yu Daiyan, who was poisoned and could not move, was pinched off the bones of his whole body by the descendants of Shaolin in the Western Regions with a strong King Kong finger and became a waste! A martial arts master with strong martial arts and respected martial arts has become a waste person who can't even take care of himself, and the resentment in Yu Daiyan's heart can be imagined, so much so that he recognized Yin Susu who caused all this ten years later, and his grief and anger are still unstoppable. And what is even more uncomfortable than Yu Daiyan is Zhang Cuishan, on the one hand, he is his own brother-like fourth senior brother, and on the other hand, he is his beloved wife. The oppression of the five major factions had already made Zhang Cuishan Alexander, and he came out again, Zhang Cuishan felt that he really couldn't stand between heaven and earth, and in an extremely agitated mood, he actually drew his sword and killed himself. Next, let's talk about whether Zhang Sanfeng has the ability to avenge Zhang Cuishan Although Zhang Cuishan committed suicide because he had no shame to face his brother, if it weren't for the fierce pressure of the five major factions, Zhang Cuishan would not be so excited, and there may be a chance for things to turn around, so Zhang Cuishan's death has a lot to do with the five major factions. If Zhang Sanfeng wants to take revenge on the five major factions on this ground, it is completely reasonable. 
So the question is, does Zhang Sanfeng have the strength to avenge Zhang Cuishan? I think there is. As mentioned earlier, the Wudang Seven Heroes once wanted to use the "True Martial Seven Interception Array" to deal with the five major factions. This formation is a set of exquisite martial arts created by Zhang Sanfeng inspired by the two objects of the Snake Mountain and the Turtle Mountain in front of the True Martial God Statue. Because this set of martial arts is broad and profound, he passed it on to seven **. If the two of them work together, they will be both offensive and defensive, and their power will be greatly increased. If three people work together, it is twice as powerful as two people working together. Four people are equivalent to eight masters, five people are equivalent to sixteen, six people are equivalent to thirty-two, and seven people are equivalent to sixty-four world-class masters at the same time. And even if the five major factions are counted, I am afraid that there will be no way to find so many first-class masters. Take the Shaolin Temple, the strongest of them, as an example, but the four holy monks of "seeing and hearing knowledge", plus "Sandu", Cheng Kun, or two or three people who are not famous, but only ten people. And Emei, only the exterminator is too supportive; There are only five people in Kongtong, and their strength can barely be regarded as first-class. In this way, in addition to the dead Zhang Cuishan, the six heroes of Wudang performed the "True Martial Seven Interception Formation", which was enough to crush the five major factions in terms of strength. What's more, there is also a land immortal-level Zhang Sanfeng, looking at the performance of Shaolin Temple when he took Xiao Zhang Wuji to Shaolin to seek "Jiuyang Gong", you can know how powerful he is. In the end, emptiness said: "Good old man, you have to test us, my emptiness is not afraid of you." Thousands of Shaolin monks flocked to it, and you may not be able to pick the Shaolin Temple. Although he said "not afraid" in his mouth, his heart was actually very afraid, so he first made the idea of thousands of people rushing to him. Zhang Sanfeng took Zhang Wuji to ask for merit, and he had no intention of taking it by force, but Shaolin Temple was waiting for it, and even beat the idea of thousands of people rushing up. It can be seen how high Zhang Sanfeng's martial arts are? 
With such strong strength, if Zhang Sanfeng really wants to avenge Zhang Cuishan, the five major factions will not be lucky. Finally, why Zhang Sanfeng didn't avenge Zhang Cuishan has both reasonable reasons and strong strength, so why didn't Zhang Sanfeng avenge his tragic death? The reason is very simple, because Zhang Sanfeng is a reasonable person. The five major factions forced Zhang Cuishan to tell Xie Xun's whereabouts, which was reasonable. Xie Xun was originally one of the four major apologetics of Mingjiao, with strong martial arts, and was designated by the sect leader Yang Dingtian as the next choice for the master, plus his wife and sons, the family is happy, and the small life is not too beautiful. Who would have thought that Xie Xun's ** Cheng Kun, in order to repay Yang Dingtian's hatred of love, it is not enough to cause Yang Dingtian to go mad, but also to completely destroy Mingjiao. For this reason, Cheng Kun did not hesitate to kill Xie Xun's entire family, and then hid in the shadows and did not come out, causing Xie Xun to go crazy, killing people everywhere and leaving Cheng Kun's name, wanting to lure Cheng Kun out. Xie Xun's various behaviors have caused many killings and countless enemies. 
The people of the five major factions who forced Zhang Cuishan to tell Xie Xun's whereabouts in Wudang Mountain that day were more or less enmity with Xie Xun, such as the Kongjian monk of Shaolin Temple who died in the hands of Xie Xun, and the Kongtong faction's "Seven Wounds Fist Book" was taken away by Xie Xun, and so on. Therefore, Zhang Cuishan's vow not to tell Xie Xun's whereabouts is the righteousness of all brothers, but the five major factions persecuted him, and there is also a righteous reason. Zhang Sanfeng is a reasonable person, so he will not take the death of his lover on the five major factions, not to mention, Zhang Sanfeng knows the real reason for Zhang Cuishan's suicide. Zhang Sanfeng was originally a simple teenager, and by chance he learned part of the "Jiuyang True Scripture", and on this basis, he created a world-famous Wudang school of martial arts. Wudang belongs to the Taoist sect, so Zhang Sanfeng often wears a Taoist uniform, but he is unkempt, and the Taoist uniform is also full of puddings and stains, so people call him "Zhang Sloppy". The appearance is sloppy, but it does not prevent him from having a clear heart. Zhang Sanfeng talks about heavenly principles, but also human principles, so naturally he will not deceive himself. Zhang Cuishan's death made him heartbroken and painful, but he knew that it had nothing to do with the five major factions. 
So Zhang Sanfeng never avenged Zhang Cuishan.