Excuse me, is this invention a personal invention or a job invention?

According to the Patent Law, an invention-creation that performs the tasks of the unit or mainly uses the material and technical conditions of the unit belongs to a service invention-creation. In this case, let's first look at whether the first condition is met: the task of the execution unit. Whether the ceramic drilling and grouting pile-forming method is one of the scientific research projects of the unit, that is, the project that must be involved in the study of small pile technology, if not, it may not be recognized as the task of the executive unit. The second is the material and technical conditions of the employing unit, which depends on whether the patented technology of ceramic art uses the material and technical conditions of the employing unit. As you said, although the early stage was a scheme conceived by the ceramics themselves, the later stage of the experiment took advantage of the material and technical conditions of the unit. It depends on whether the main part of the patented technology must use the later experimental data. If not, of course, it is impossible to use the material and technical conditions of the unit.