Three months ago.
Helian Yueyin suddenly returned to the country, bringing with her a "big gift" for her younger brother.
This gift was none other than a flying saucer.
Previously, Chi Xingye had arrived in their world first with Bu and her subordinates, while Zuo Yijue and his subordinates arrived two years later.
After the battle of Ghost Slaughter, many of Chi Xingye and Zuo Yijue's subordinates were injured or killed, reducing their numbers to less than a third of the original.
Thus, three years ago, when Chi Xingye returned with Zuo Yijue and all their subordinates, they only took one flying saucer back.
The flying saucer that Helian Yueyin brought back was the one left behind by Zuo Yijue.
Mo Shang kept it tightly concealed; it wasn't until the second year after Chi Xingye left that Helian Yueyin knew about it.
She always felt guilty!
