Yes, the method can be applied for an invention patent.
Inventions as mentioned in the Patent Law refer to new technical solutions proposed for products, methods or their improvements. Inventions are divided into two major types: product inventions and method inventions. Product inventions include all items created by humans, and method inventions include all methods that utilize the laws of nature through inventions and creations. Method inventions can be divided into two types: manufacturing methods and operating methods. In addition, inventions protected by patent law can also be improvements to existing products or methods.