Fang Zhao belonged to batch of cast and crew that would be leaving slightly later. Mo Lang hoped that Fang Zhao could stay on a little longer to discuss questions regarding composing, so as a result, Fang Zhao would be leaving later.
But when Fang Zhao was leaving planet Wai, there were still some crew members handling postproduction and others who wanted to tour around planet Wai that would still be staying on.
Mo Lang had already completed the series's 10-minute ending theme, and he had decided to call his family over to visit the scenic areas on planet Wai and maybe search for more inspiration for composing. Thus, he did not return with Fang Zhao.