《后汉书·列传·南匈奴列传》
单于派使者上书，献来两头骆驼、十匹毛色有纹彩的马。
遣使上书，献骆驼二头，文马十匹。
The Chanyu sent an envoy to deliver a memorial and present two camels and ten horses with patterned fur.
<s>[INST] Kindly elucidate the central themes in this passage in English: 遣使上书，献骆驼二头，文马十匹。 [/INST] The Chanyu sent an envoy to deliver a memorial and present two camels and ten horses with patterned fur.</s>
Kindly elucidate the central themes in this passage in English: 遣使上书，献骆驼二头，文马十匹。
user
The Chanyu sent an envoy to deliver a memorial and present two camels and ten horses with patterned fur.
assistant