First, it's either an exotic species made in China, like the example upstairs, or a scarab. Several subspecies of scarab are characterized by golden bellybutton, but they all have dark green or light green patterns on their backs. The landlord mentioned "golden yellow around the carapace" in the description process. I think there are patterns in the middle of the carapace, so it is likely to be considered as a subspecies of Fang Sheng's scarab. The photo provided on the second floor is when they were young, and the photo provided on the first floor is the second one.

There is also a possibility that it is a yellow variety, which is rare and can only be determined by looking at pictures. Common ones are yellow Brazilian tortoise and tortoise, so the landlord can check it out.