The four characters written by Zhao Mengfu in regular script are quiet and profound.

The word "Jingyuan" written by Zhao Chunkai seems to be hard to find. I scanned it for you according to the information I can find at hand. But they are all close to the running script, so we can learn from them and write Zhao's style. As shown in the figure:

The letters marked in red are Zhao Ti regular script, and others can be treated with lingering strokes, which are Zhao Ti regular script.