### 设置文字装饰及大小写转换

Chongqing, abbreviated as "Yu", is a municipality directly under the central and western regions of China, famous for its mountainous city characteristics, hotpot culture, and the beautiful scenery of the confluence of the Yangtze River and Jialing River.

Sichuan, abbreviated as "Chuan" or "Shu", is located in southwestern China and is a province known for its magnificent natural scenery, rich cultural heritage, and spicy cuisine.

Guizhou, abbreviated as "Qian" or "Gui", is located in southwestern China and is a province renowned for its diverse ethnic cultures, spectacular karst landforms, and beautiful natural landscapes.