First of all, Zhang Hai's signature is fake at first glance. Zhang Haikuan's characteristic is to simplify the cursive writing, but the strokes are all the same, but the vertical and dot of this "Zhang" are wrong. The word "sea" should be like "flow" instead of "flow", leaving out the last stroke of "sea", but the strokes are very strong, and this work has only one curve.
Second, the combination of words. This is not written by Zhang Hai.