The char-forming agent developed by Weifang Wanfeng Technology is a composite product based on specially treated nano-lamellar materials. It promotes char formation, smoke suppression, and anti-dripping in polymers, and suppresses glowing combustion. It can be used together with flame retardants such as aluminum hydroxide and magnesium hydroxide, forming a coke layer on the polymer surface after combustion to isolate air, block heat transfer, and improve the flame-retardant rating.