《北齐书·列传·卷四十一》
周军听说后，以为齐军的大队人马快要来了，就撤军解围而去。
周人闻之，以为大军将至，乃解围去。
After the Northern Zhou army heard about this, they thought that the main force of the Northern Qi army was about to arrive, so they withdrew their troops and lifted the siege.
<s>[INST] Kindly elucidate the central themes in this passage in English: 周人闻之，以为大军将至，乃解围去。 [/INST] After the Northern Zhou army heard about this, they thought that the main force of the Northern Qi army was about to arrive, so they withdrew their troops and lifted the siege.</s>
Kindly elucidate the central themes in this passage in English: 周人闻之，以为大军将至，乃解围去。
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After the Northern Zhou army heard about this, they thought that the main force of the Northern Qi army was about to arrive, so they withdrew their troops and lifted the siege.
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