《三国志·蜀书·邓张宗杨传》
但他对于朋友的感情就很坚定，非常的忠诚厚道。
然笃於旧故，居诚存厚。
However, he had very strong feelings for his friends, and was very loyal and honest.
<s>[INST] Convert the following modern Chinese text into Classical Chinese: 但他对于朋友的感情就很坚定，非常的忠诚厚道。 [/INST] 然笃於旧故，居诚存厚。</s>
Convert the following modern Chinese text into Classical Chinese: 但他对于朋友的感情就很坚定，非常的忠诚厚道。
user
然笃於旧故，居诚存厚。
assistant