How to pronounce the word "Huan" in ancient poetry?

The last sentence of Su Shi's Niannujiao. "Red Cliff Nostalgia" is "Life is like a dream, and a statue is still on the river."

In Liu Yuxi's "Shicheng", "Huaishui is east of the old moon, and the female wall comes late at night."

Li Qingzhao's "Slow Voice" and "When it is warm and cold, it is the most difficult to stop. "

Should the pronunciation of "Huan" in the previous sentence be pronounced as "Huan" or "Hai"?

How to determine the pronunciation of "Huan" in classical poetry?

The word "Huan" in "Life is like a dream, and the moon is full of respect" means "going back"

"In the old days, Huai Shuidong came to the female wall at night." Reading the sea means "still"

The word "Huan" in "it's the hardest to lose interest when it's warm at first" means "return"

It is an adverb when reading the sea.

When you read "Huan", it is a verb.

The dictionary of common words in ancient Chinese has the meaning of "Shang (post-meaning)", but the pronunciation is still under Huan, which does not mark the sea. This word has only one pronunciation, Huan, no sea. In ancient times, there may not be the sound of "hai". In Cantonese, both words are pronounced as "Huan".

The Dictionary of Ancient Chinese compiled by Bashu Bookstore has three pronunciations.

Huan (second tone): return; Repayment; Gu huitou; If it is returned, because it is; Pass me the ring.

Xuan (two tones): Xuan, Xuan; Quickly; Agile.

Sea (double tone): static, static; More. [Old tune: Huan (Second tune)]