《新唐书·列传·卷一百三十三》
肃宗逐渐委以辅弼重任，改名为护国，后又改今名。
肃宗稍稍任以肱膂事，更名护国，又改今名。
Emperor Suzong gradually gave him heavy responsibilities and changed his name to Fuguo. Later on, he changed his name to the current one.
<s>[INST] Kindly elucidate the central themes in this passage in English: 肃宗稍稍任以肱膂事，更名护国，又改今名。 [/INST] Emperor Suzong gradually gave him heavy responsibilities and changed his name to Fuguo. Later on, he changed his name to the current one.</s>
Kindly elucidate the central themes in this passage in English: 肃宗稍稍任以肱膂事，更名护国，又改今名。
user
Emperor Suzong gradually gave him heavy responsibilities and changed his name to Fuguo. Later on, he changed his name to the current one.
assistant