Homemade citron tea can be made in the following ways:

Peel the grapefruit to remove the white layer inside, mash the grapefruit meat, and prepare the right amount of rock sugar.

Try to walk behind the grapefruit skin to let the thin yellow skin leak out.

Then rub the surface of grapefruit skin with salt to remove the wax on the skin and rinse it for later use.

Cut into filaments with a knife and soak in light salt water for one hour.

Control the soaked grapefruit peel with clean water, put it in another clear water pot, continue to cook until it is slightly boiled, and add rock sugar.

Cook the shredded skin for about half an hour, then pour in the grapefruit meat and continue cooking for about an hour.