What is the fine-grained topic of the following text: King Kang proclaimed an edict to Duke of Bi 畢 (known as the Biming 畢命) to take over the administration of the eastern capital Chengzhou 成周 (or Luoyi 雒邑, modern Luoyang 洛陽, Henan). Only return the topic.
King Kang's edict to Duke of Bi for the administration of Chengzhou.