First of all, according to the above knowledge, idioms are four-word phrases established in language, which usually have a fixed structure and meaning. However, "picturesque scenery" is not widely accepted and recognized, and has no fixed structure and meaning, so it cannot be regarded as an idiom.
Secondly, from the semantic point of view, "picturesque scenery" has no clear meaning. In Chinese, "feng shui" usually refers to choosing the location of buildings or cemeteries according to factors such as topography, water flow and climate, so as to achieve the effect of seeking good fortune and avoiding evil; And "picturesque" is picturesque Therefore, the word "picturesque" is semantically unreasonable and does not meet the requirements of idioms.