《魏书·列传·卷八十六》
元象二年夏，又派散骑常侍沈山卿、通直常侍刘研前来朝贡。
二年夏，又遣散骑常侍沈山卿、通直常侍刘研朝贡。
In the summer of the second year of Yuanxiang, Xiao Yan sent aide Shen Shanqing and aide Liu Yan to pay tribute.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 二年夏，又遣散骑常侍沈山卿、通直常侍刘研朝贡。 [/INST] In the summer of the second year of Yuanxiang, Xiao Yan sent aide Shen Shanqing and aide Liu Yan to pay tribute.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 二年夏，又遣散骑常侍沈山卿、通直常侍刘研朝贡。
user
In the summer of the second year of Yuanxiang, Xiao Yan sent aide Shen Shanqing and aide Liu Yan to pay tribute.
assistant