Turnoi, it seems that you and your most favourite pets, Linda and John, are fishing in troubled waters regarding the old chestnut, Yuncheng IELTS.
Be aware that Yuncheng's salt lake would not be a suitable home for your amphibian reptiles. Why not? Because it has no fishes in it, being too saline, just like the Dead Sea of biblical fame. Even salt-water crocs couldn't survive in it. But your crocs cannot be of the relatively friendly salt water variety. They're freshwater crocs, as they're so aggressive!
If you have time, why don't you visit Yuncheng, famous for its salt lake? I'm sure you'd have a good time there. It's so salty that you can float on it without swimming a stroke!