Hello, are you asking if it is illegal to start work without construction drawing when the land is leveled? It is illegal to start land leveling without construction drawings. Engaged in construction activities, we must strictly implement the basic construction procedures, adhere to the principle of first survey, then design and then construction, and the specific measures for the review of construction drawings and design documents shall be formulated by the construction administrative department of the State Council and other relevant departments of the State Council. Construction drawing design documents without examination and approval shall not be used. Therefore, it is illegal to start land leveling without construction drawings.