Scientists extracted fat cells from the patient, turned them into stem cells (induced pluripotent stem cells), then back into pancreatic islet cells now able to produce insulin. These functioning islet cells were then simply injected into the patient’s abdominal muscles. Injection into the abdominal wall minimized invasiveness and avoided inflammation compared to previous practices of injection into the liver. The entire injection procedure took less than half an hour.
Because the cells are from the patient’s own body, they don’t need a compatible donor and experience no immune rejection to the transplant.
Afterwards, the patient’s blood sugar levels became normal and they no longer needed external insulin.
Here’s the research paper link: https://www.cell.com/cell/abstract/S0092-8674(24)01022-5
The Chinese government goes through painstaking lengths to cultivate an entire supply chain of everything, from the production of raw materials, cheap mass manufacturing, high end tech, STEM graduates, scientific instruments and every industrial product under the sun (Literally, they are the only country in human history to produce every category of industrial product).
They also go through great lengths to automate and standardise production and research, to grow promising industries ans culling obsolete ones.
This gives Chinese industry and researchers a huge advtange, since anything they need to do their activities is easily and quickly available. You would be surprised at how much time and effort is wasted in academia maneuvering around this or that material limitation.