Xiehou Ta de Shaonu Shidai

Korean webtoons that have been animated, either as Japanese anime, Korean aeni, or Chinese donghua.

There's also 'Na Bbeun Sang Sa' (Bad Boss) which I excluded since it's tagged as hentai. For PVs, check out abystoma2's Animated Manhwa Commercials: https://myanimelist.net/stacks/13750

Announced: Nano List, Seasons of Blossom, Terror Man, The Boxer, Who Made me a Princess

thanks to ZXEAN for tips
Part 2: https://myanimelist.net/stacks/59494

Collection of all 2D Fantasy & Supernatural Donghua (only the first season entry)

Speaks for itself, but it can contain chinese folklore or chinese historical elements, like spirits and dynasties

Anime found on Viki Rakuten. (details explain if subscription is needed:)

+ "Leiji Matsumoto;s OZMA" (watch free)
+ "My Little Boys" (watch free)

𝙍𝙀𝙂𝙐𝙇𝘼𝙍 𝙐𝙋𝘿𝘼𝙏𝙀𝙎 | 𝙌𝙐𝘼𝙇𝙄𝙏𝙔 𝙎𝙀𝙇𝙀𝘾𝙏𝙄𝙊𝙉 | 𝙑𝙄𝙎𝙄𝙏 𝙋𝙍𝙊𝙁𝙄𝙇𝙀 𝙁𝙊𝙍 𝙈𝙊𝙍𝙀
2D Chinese anime/donghua that I recommend personally with passable animation and art styles.

Includes Japanese, Korean and Chinese anime adaptations of Korean Manhwa.
Not all but the most popular and most notable adaptations.