-Guangdong Mingjian Document Judicial Appraisal Institute: As one of the appraisal institutions with the largest number of document cases in Guangdong Province, handwriting appraisal belongs to the category of documents and is a more reliable choice.
-China Judicial Appraisal Center, as the competent department of judicial appraisal institutions in China, is one of the authoritative appraisal institutions with the highest level and recognized by the state.
-The Institute of Science and Technology of Beijing Public Security Bureau is a scientific research institution directly under Beijing Public Security Bureau. It has a high professional ability and technical level in domestic public security organs and is one of the more professional appraisal institutions.