血书

rú jīn pí jiā kè hé xuè shū bèi shì jiè shang de bó wù guǎn hé shōu cáng jiā zhēn cáng zhe

如今，皮夹克和“血书”被世界上的博物馆和收藏家珍藏着。

Today, leather-flying jackets and "blood chits", are prized by museums and collectors all over the world.