The Spell Carved on the Sarcophagus

A couple from ancient times and reincarnated mandarin ducks have been reincarnated several times. In the era of Loulan's decline, the last king of Loulan trapped the girl in white in a sarcophagus. I want to use this to arouse God's favor for Loulan. However, as the Loulan people brought this legend into the Central Plains many years later, their descendants who wanted to restore Loulan were surprised to find the girl in white with a long flute in the crowd, and her name was still Baiyi...