In the China-Burma-India threatre of World War II, Flying Tiger pilots were issued silk Blood Chits by the Chinese government.  The chits identified the bearer as a friend of the Chinese.  They asked the Chinese people to protect and  help downed flyers, which they did with enthusiasm.

At the top of the chit was the flag of the Nationalist Government of China with a white sun and twelve rays (not a star, not a flower).  You can find the literal translation and the meaning of the characters below our Flying Tiger blood chit.

The blood chits did not promise a reward, did not carry the pilot's name, and did not carry Chiang Kai-shek's signature or chop.  Silk blood chits were stamped with a serial number and the chop of the Nationalist Government's  Commission for Aeronautical Affairs.

When pilots sewed their chits onto their flight suits or jackets, they did not wear well.  And they would be available only if they wore that particular garment.   Many aviators carried their official blood chit in a convenient pocket or sewed it into their jacket lining as an extra pocket.

 

Col 5, 6	Col 4	Col 3	Col 2	Col 1
Issuing Authority	Deliver Protect	Soldier Civilian One Body	Foreign Person	Come China Help Fight
"This foreign person has come to China to help in the war effort. Soldiers and civilians, one and all, should rescue, protect, and provide him medical care." Issued by the Commission for Aeronautical Affairs.