开夜车

The Chinese word "开夜车" is a compound word consisting of two characters: "开" (kāi) and "夜车" (yèchē). The character "开" means "to open" or "to start", while the character "夜车" literally means "night car". Together, the two characters form the idiom "开夜车", which means "to stay up late studying or working".The origin of this idiom can be traced back to the early days of China's imperial examination system. During the imperial era, scholars would often study late into the night in order to prepare for the exams. In order to make the most of their time, they would often travel by night, using the time on the journey to study. This practice of studying late into the night and traveling by night became known as "开夜车".Over time, the idiom "开夜车" came to be used more broadly to refer to any situation where someone stays up late studying or working. It is often used in a humorous or self-deprecating way, and can be used to describe both positive and negative situations. For example, a student who stays up late studying for an exam might say "我今天要开夜车了", while a worker who stays up late to finish a project might say "我今天又要开夜车了".In conclusion, the Chinese word "开夜车" is a compound word that literally means "to open a night car". It originated from the practice of scholars studying late into the night and traveling by night during the imperial examination system. Over time, it came to be used more broadly to refer to any situation where someone stays up late studying or working.