《旧唐书·列传·卷一百一十六》
正值宪宗皇帝当廷策试召天下人才，白居易应对得到皇帝赏识，又登甲科。
会宪宗皇帝策召天下士，对诏称旨，又登甲科。
Emperor Xianzong was inspecting talents from around the country, and Bai Juyi's response impressed the emperor, and he was again admitted to the highest level.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 会宪宗皇帝策召天下士，对诏称旨，又登甲科。 [/INST] Emperor Xianzong was inspecting talents from around the country, and Bai Juyi's response impressed the emperor, and he was again admitted to the highest level.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 会宪宗皇帝策召天下士，对诏称旨，又登甲科。
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Emperor Xianzong was inspecting talents from around the country, and Bai Juyi's response impressed the emperor, and he was again admitted to the highest level.
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