30,000 to 50,000 words. The number of words in master's thesis of engineering is generally between 30,000 and 50,000 words. The specific number of words can be adjusted according to the specific requirements of schools or research fields. The number of words in the opening report is generally about 3000 words, and the abstract of the paper is generally about 1000 words, but it can be extended to 2000 words if there is special need. The main body of the master's thesis is generally about 30 thousand words after the opening report, but it also needs to be adjusted according to the regulations of the school. Engineering academic paper is a kind of academic paper. Engineering academic papers are theoretical articles with natural laws as the research object. Engineering is a discipline developed by applying the principles of basic sciences such as mathematics, physics and chemistry, combined with the technical experience accumulated in production practice. Representative disciplines include civil engineering, water conservancy, electrician, electronic information, thermal energy and nuclear energy, instrumentation, chemical industry and pharmacy.