"The power of candle can protect the state of Zheng for a while, but it can't protect the state of Zheng for the first time" is a historical record. A famous saying in Wei Kangshu's Family means that it is impossible to maintain a country's stability and prosperity for a long time only by relying on military force, and many factors such as politics, economy and culture are needed to support the country's prosperity and development.

The background is that during the Spring and Autumn Period, the State of Zheng faced the siege of Zhou, Lu and other countries. Wei Kangshu, the doctor of the State of Zheng, wanted to solve the situation through war, so he appointed Candlewood as a general, but it didn't work in the end, and Candlewood was killed.