C470 Explanation of 'grandaunt

Just as Xian Da and Zhao Yiyang were deep in conversation, a clear and melodious voice suddenly came out from behind Xian Da. It was a voice that was not too far away, and it slowly came out: "Aunt? saltpetre, who are you talking about? "

Hearing that voice, Xian Da's first reaction was to become quick-witted, and his second reaction was to run