The black raven heard the whistle, flew down, and landed gently on Liushiliu's left arm. Liushiliu stroked the wet feathers of the raven a few times before opening the small leather bag tied to its leg.
Liushiliu took out a small bamboo tube, opened it, and took out a piece of paper. He unfolded the paper and read the secret message. When he was focused on the secret message, the black raven jumped onto his shoulder to rest.
A few seconds later, Liushiliu finished reading the secret message, and his eyes lit up. He then took out a lighter and burned the letter.
