《宋史·本纪·卷三十五》
初六，命令两淮戍兵每年更换一次。
丁丑，命两淮戍兵岁一更。
The sixth, it was ordered that the garrison troops of Liang Huai be replaced annually.
<s>[INST] Rewrite the following English passage in the style of Classical Chinese: The sixth, it was ordered that the garrison troops of Liang Huai be replaced annually. [/INST] 丁丑，命两淮戍兵岁一更。</s>
Rewrite the following English passage in the style of Classical Chinese: The sixth, it was ordered that the garrison troops of Liang Huai be replaced annually.
user
丁丑，命两淮戍兵岁一更。
assistant