C720 Dna

The four of them were already standing in the hospital ward.

This was the sickroom that Cheng Yijie stayed in back then.

Not to mention a single strand of hair, there wasn't even a speck of dust on it.

Because of the special nature of this ward, all the bedding that had been replaced would be destroyed.

If it was just for cleaning, there was still the possibility of extracting DNA. However