In October 1998, the Executive Office of the Independent Commission Against Corruption of Hong Kong publicly selected a Chief Investigation Officer from all staff of the Office. After strict qualification review and democratic recommendation, more than 10 people finally entered the written test.
Cai Shuangxiong, who was 43 years old at the time, also took the selection examination. Cai Shuangxiong joined the Independent Commission Against Corruption at the age of 25 and has undertaken many major and important cases with a high level of professionalism. For this exam, he made full preparations.
The exam went smoothly, and it was mostly professional questions. Cai Shuangxiong was very familiar with it. However, the last question stumped Cai Shuangxiong. This question is worth up to 20 points, and success or failure depends on this. The title is this: Please briefly describe what measures Emperor Taizong Li Shimin of Tang took to protect the environment, and elaborate on their rationality. Cai Shuangxiong's knowledge is not narrow, and he admires Li Shimin very much. He usually read many books about Li Shimin. But at this time, he racked his brains and couldn't remember what policies Li Shimin had taken in environmental protection.
The time for handing in the paper was approaching. In desperation, Cai Shuangxiong had to write a line on the test paper: I really can’t remember what Li Shimin had done in environmental protection. Sorry, I won’t answer this question.
If a 20-point question is not done, where is there any hope? After handing in the paper, Cai Shuangxiong looked very depressed. What environmental protection does the ICAC consider when selecting officials? After some close colleagues learned about the situation, they all comforted Cai Shuangxiong.
What I didn't expect was that after two weeks, the test results came out, and Cai Shuangxiong actually got full marks for the last question, and only he got full marks. Cai Shuangxiong became the only candidate to enter the interview.
The selection committee explained this: At the time of Emperor Taizong, there was no such thing as environmental protection. Looking at Li Shimin's life, he has not taken any measures to protect the environment. This question has no answer at all, or the most standard answer is "don't know".

In fact, this question is drawn from the UNESCO test question bank, the purpose is to test the integrity of the candidates. "Knowing is knowing, not knowing is not knowing", this is the attitude one should have. Regrettably, there are so many candidates who have listed Li Shimin's many environmental protection measures in a brilliant way, and they have used hundreds of words to discuss their scientificity and rationality.
A person’s virtues are often revealed in the details.

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