Give me some advice on this hard pen calligraphy! thank

Very good running script! The foundation is very good, so I can only write too carefully. Many strokes are regular script, such as horizontal oblique strokes. The running script must be written freely, the strokes should be smooth and natural, and the echo between words should be paid attention to when writing works, so as to create a brush gesture. I suggest you look at Gu Zhongan's running script.