Luoyang (705) — the same event in Old Book of Tang and New Book of Tang

Old Book of Tang: Emperor Zhongzong restored the national name to Tang.; New Book of Tang: The state name was changed back to Tang (the Zhou dynasty…

What each source says

Old Book of Tang (Jiu Tangshu), Annals · AD 705 · 洛陽

Emperor Zhongzong restored the national name to Tang.

二月甲寅，復國號，依舊為唐。
Location: 舊唐書 卷7 神龍1年 2月

New Book of Tang (Xin Tangshu), Annals · AD 705 · 洛陽

The state name was changed back to Tang (the Zhou dynasty was abolished).

復國號唐
Location: 新唐書 卷004 則天·中宗 神龍1年2月

Place: 洛陽

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