Song of Silver Flame Like Nigh - Amelie Wen Zhao

In a fallen kingdom, one girl carries the key to discovering the secrets of her nation's past—and unleashing the demons that sleep at its heart. An epic fantasy series inspired by the mythology and folklore of ancient China.
"Perfect for fans of The Untamed. I loved it!" —Shelley Parker-Chan, bestselling author of She Who Became the Sun
Once, Lan had a different name. Now she goes by the one the Elantian colonizers gave her when they invaded her kingdom, killed her mother, and outlawed her people's magic. She spends her nights as a songgirl in Haak'gong, a city transformed by the conquerors, and her days scavenging for what she can find of the past. Anything to understand the strange mark burned into her arm by her mother in her last act before she died.
The mark is mysterious—an untranslatable Hin character—and no one but Lan can see it. Until the night a boy appears at her teahouse and saves her...