What is the price of He Xingzhen's calligraphy? Will it add value?

It's not worth it. There is no price. Because there is no name. You can't even find such a person online. You still expect his things to be collectible? If you want to collect, I advise you to collect famous artists. Don't let people fool you. There are so many fake calligraphers now. . Cheating money with a calligrapher's hat is nothing!