What does it mean to kill for an official to control the calamity?

It means: This is ("is" means "this", "wei" means "is") the Official Killing Star has restrained the Bijie Star. This is an auspicious omen in the horoscope.

Official killing and calamity are both zodiac signs in fortune.

Bi Jie: The so-called Bi Jie is based on the Sun Lord (the fifth character of the eight characters) as the standard. The Sun Lord represents oneself, and the five elements that are the same as oneself, Yin and Yang are the same as Bi (Bi Jie), and the Yin and Yang are different. For example, if the ruler of the sun is Renshui, then encountering other Renshui will be your "bi", and encountering Guishui will be your "tribulation". Those who are stronger than calamity, and light on wealth, value friendship and love to fight against injustice.

Official killing: that is, official ghost.

Ming Dynasty Wan Minying's "Three Ming Tonghui·On the Year of Geng": "The spring lunar month of Geng and Xin coincides with wealth. The most taboo is to compare the calamity with the head. Official killings should be separated and mixed with suspicion. It is better to use auspicious signs to strengthen the body.