Having money really can let you do whatever you want. Erbao was recently found to have uremia, and it hasn’t even been that long—one moment it’s a Hong Kong hot pot banquet, and the next it’s a Las Vegas gathering.

As far as I know, patients with uremia have very poor physical stamina and can basically not endure long-distance traveling; otherwise, it would do tremendous damage to the body.
Erbao probably had his kidney replacement lined up and started queuing not long after the diagnosis. He should currently have three kidneys in his body—like adding an independent graphics card—while the other two “original kidneys” are already powered off, in a shut-down state.
I looked it up: the two original kidney positions are located deep in the lower back. If you forcibly remove them, it would not only require additional surgery, but also increase the risk of bleeding, trauma, and infection.
As long as these two discarded kidneys aren’t severely infected, don’t have huge cysts, and haven’t caused uncontrollable malignant hypertension, doctors usually choose to let them “retire and power down” in place—leaving them there and ignoring them.
The newly installed kidney typically isn’t placed into the original position in the lower back; instead, it’s installed in the patient’s right lower abdomen or left lower abdomen (the iliac fossa).
This is mainly because it’s closer to the bladder, with shorter and more convenient connecting tubes (ureters). Also, the blood vessels here are thicker (the iliac arteries and veins), which makes it very suitable for directly connecting the blood-supply line of this “new engine.”
So, this process is like a hardware upgrade—attaching a brand-new power source to the front of the case to keep the entire system running.