Clones certainly exist on the wasteland, but their presence is not welcomed. Especially for the clones "produced" from the fallout shelters; they served as toys. While the phenomenon changed when NAC took office, but people's natural discrimination against these unnatural born lives could not simply be changed with a decree.
The best case scenario was to separate Lin Lin's sisters from the survivors and have them taken care of by professional caregivers.
Sun Jiao's proposal received unconditional support from Lin Lin.
Building a research institute behind the mansion was a compromise. They didn't live too far away but there was no need to see them every day. Thinking from Lin Lin's perspective, it would be odd if she saw someone who looked exactly like her every day, Jiang Chen didn't think he could stand the idea.