It would probably be about as easy as a lawyer trying to write a new OS, because from the outside it looks like it should be straightforward.
However, keep in mind this is Chinese law which at this point is only enforced selectively to back the goals of its dictator and the CCP. If dictator Xi Jumping did not want this feel good story to run, it would not have ran. If this farmer had any way even hinted it crossing the communist party of China, he probably would have been murdered and buried in his own field.