Yanji Siji Vocational and Technical School. According to the inquiry of Yanji Local Treasure, Yanji Four Seasons Vocational and Technical School is the best in Yanji Electric Welding Training School. Yanji is a county-level city under the jurisdiction of Yanbian Korean Autonomous Prefecture, Jilin Province, and also the capital of the autonomous prefecture. Yanji is located in the east of Jilin Province, the middle of Yanbian Prefecture and the northern foot of Changbai Mountain, and is in the hinterland of Northeast Asian economic circle.