《周书·列传·卷十一》
同突厥约定在第二年再度举兵，南北相互呼应。
期后年更举，南北相应。
An agreement was reached with the Turks to raise troops again the following year, and to join together in a north-south campaign.
<s>[INST] Convert the following modern Chinese text into Classical Chinese: 同突厥约定在第二年再度举兵，南北相互呼应。 [/INST] 期后年更举，南北相应。</s>
Convert the following modern Chinese text into Classical Chinese: 同突厥约定在第二年再度举兵，南北相互呼应。
user
期后年更举，南北相应。
assistant