https://youtu.be/l2-wjOp25Aw

1~8: 2019/08/28
9~11: 2019/08/29
12~14: 2019/08/30
15: 2019/09/02
16~18: 2019/09/03

Give up the first build and going to build the second? Why?

Ref:
https://www.inaturalist.org/observations/32206978