As for the hot water bottle, Xu Mumu had Zhou Yunhong deliver it to Huo Qingze's place. Fang Zheng and Yin Yang have no business here, but Huo Qingze is handling everything.
Apart from running a tutoring class, Huo Qingze is involved in various things, and he should still be busy during this time.
Indeed, Huo Qingze is busy. Ever since the hot water bottle launched, it's been selling very well, to the point that production almost can't keep up with sales. There aren't many poor people in the Imperial City; the hot water bottles are practical and durable, only needing to be filled with hot water, and with a nice fabric cover, they're quite popular.
When Xu Xue went to find Huo Qingze, the gate of the yard was closed and there was no one around. Xu Xue was extremely frustrated, guessing if Xu Mumu had given her a fake address to mess with her.
