Mix the pineapple juice, sugar, and soy sauce in a large bowl
Marinate pork with the pineapple juice, sugar, and soy sauce mixture for about 1 to 3 hours
Remove the pork from the marinade and set the remaining mixture aside
Heat the oil in a pan and fry the marinated pork until the meat turns light brown (approximately 3 to 5 minutes)
Pour in the remaining marinade mixture together with the pineapple chunks and beef broth and simmer for 45 to 60 minutes
Add salt and pepper to taste
Serve Hot. Enjoy!