Here are some recommendations for completed sweet ancient romance novels:
1. "月明千里" by 羅青梅: This novel tells the story of a forbidden love between a princess from the Han Dynasty and a monk from the Western Regions. The male lead is reserved and the female lead is a time-traveler.
2. "守寡后我重生了" by 笑佳人: This novel is about a woman who is reincarnated and seeks to uncover the truth behind the tragedy that befell the male lead's family in her previous life. It is a story of love that develops after marriage.
3. "我就是這般女子" by 月下蝶影: This is the story of a vulgar woman who has been divorced three times and her relationship with a pseudo-gentleman male lead.
4. "攻玉" by 凝隴: This is a fantasy ancient romance novel about a talented man who simultaneously solves mysteries and pursues his wife.
5. "表妹萬福" by 蓬萊客: This novel features a weak female lead and a powerful male lead, with some elements of female lead abuse.
6. "重生后成了皇帝的白月光" by 多多亦杉: This is a sweet ancient romance novel with a double reincarnation theme.
Please note that these recommendations are based on the provided search results and may not reflect personal preferences or opinions.