The companies you asked about are Chinese manufacturers of various no-brand name electronic products, ranging from LCD TV's, digital photo frames, laptops, mobile phones to mention a few.
Litinic Group - manufactures LCD TV's. They have been online for a little over a year. I was unable to find any negative reviews about them.
Express Luck - manufacturer of home appliances. They have been online since 2001.
Kingstronic - They are a Chinese electronics manufacturer They have been online since 2000.
Shibang - They have been online since 2007. They accept western union and bank transfer payments for your order.
I have emailed all four companies to ask for more information about their products, like their required MOQ, if they offer safe payment methods, return policy and the possible contact person you can reach for your inquiries.
I will let you know once I get a reply from any of theses companies.
Hope this helps.