Thanks everybody for help, so many ideas.
My first trotters, I’ve used @ccj’s recipe since I had all the ingredients at home without further shopping and the recipe only need 2 trotters. Also Mr n requested Chinese food this week.
I added much more ingredients like dark soy sauce, salt, as I used a bigger pot with more water. In addition, I added some black vinegar. The meat was melting in mouth with the gelatine. Despite the strong cooking liquid, the seasoning of the pork was just right. Really good. Will make it again, with more feet of course.