Alora Craig came to China specifically to seek out her enemy, Angel. Yes, Angel had become her enemy because Angel had humiliated her.
The reason she knew Angel was in China was through her deductions and reasoning. Maurice and Angel had disappeared together, but Maurice's family had all come to China. Although they didn't immigrate and claimed to be only accompanying their children to school, the timing didn't add up.
Another clue was that Alora had found the teahouse in Chinatown. Based on the statements from several Tea Artists there, their boss was a Chinese person. She concluded that Angel must be a Chinese person and might have even sneaked back into the country. Thus, finding Maurice's family would likely lead her to Angel soon.
