At sunset, the Xihe River is playing solar terms.

At sunset, Xihe is playing solar terms, and the answer is: basking in autumn.

Sunbathing in autumn is a typical agricultural custom phenomenon with regional characteristics. Villagers living in mountainous areas have to use bamboo poles to dry or hang crops in front of and behind their houses and on their windowsills and roofs because of the complex terrain and little flat land, which has evolved into a traditional agricultural custom phenomenon over time.

This special lifestyle and scene of villagers drying crops has gradually become the material pursued and created by painters and photographers, and created a poetic name "drying autumn".

Mysterious form

Like other art forms, crossword puzzles are the most memorable and attractive because of their external manifestations. This riddle embodies the essence of crossword puzzle. It usually consists of short and pithy words, phrases, sentences or ballads and poems with expressive power.

Mysterious language has very special requirements. It should be concise, vivid and easy to understand. The main features of Chinese characters in crossword puzzles can only be vividly expressed by the images of things. It is not popular to pile up long, obscure and boring conceptual terms.