《明史·列传·卷三十二》
燕王命人将此旗送回北平，让世子小心收藏，以示后世。
王使人送旗北平，谕世子谨藏，以示后世。
The King of 燕 ordered the flag to be sent back to Beiping, and had the young prince carefully store it, to show posterity.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 王使人送旗北平，谕世子谨藏，以示后世。 [/INST] The King of 燕 ordered the flag to be sent back to Beiping, and had the young prince carefully store it, to show posterity.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 王使人送旗北平，谕世子谨藏，以示后世。
user
The King of 燕 ordered the flag to be sent back to Beiping, and had the young prince carefully store it, to show posterity.
assistant