Can I only eat it in Hat Yai?
No. Hat Yai-style fried chicken is sold in other areas too. If you have come to Hat Yai, you could have the dish known by the city’s name with sticky rice.
Hat Yai Fried Chicken · ไก่ทอดหาดใหญ่
In Hat Yai, try crispy fried chicken served with fried shallots. It is Hat Yai fried chicken, known by the name of the city. The crispy chicken gets the richness and aroma of the shallots, and it goes well with sticky rice. Put some of the shallots served with it on a piece of chicken and try a mouthful.

It is a dish where you enjoy the crunch of fried chicken together with the rich flavour of shallots. Another feature is that it is seasoned with aromatics such as garlic, coriander root and white pepper. You could also try the chicken and shallots together before adding any sauce.
Eating fried shallots with the chicken brings out more richness.
Hat Yai is a city in the Songkhla area, where the food cultures of the Chinese and Muslim communities sit together. Hat Yai fried chicken is known as a signature dish of the area. It is sold in other cities too, but if you have come to Hat Yai, have it as a meal with sticky rice.
No. Hat Yai-style fried chicken is sold in other areas too. If you have come to Hat Yai, you could have the dish known by the city’s name with sticky rice.
No. You cannot decide whether something is halal from the type of meat. If you need a halal meal, check the restaurant’s certification and the actual ingredients and cooking conditions.
If you would like to read more about the food and the regions behind it, these sources are worth a look. Ingredients and cooking methods can vary from one cook to the next.