Joke Collection Website - News headlines - What information is contained in the search and rescue marks left by the international rescue team after the search and rescue?

What information is contained in the search and rescue marks left by the international rescue team after the search and rescue?

The letter in the circle is cisar, then draw a V and draw a long line on it. cisar (China?Internatioinal?Search?and?Rescue?Team) is the English abbreviation of China International Rescue Team.

The horizontal line indicates that the house has been inspected but has no signs of life. ?

(Pictures from the Internet)