Liuying Vocational Senior High School is a national key vocational high school with a profound historical and cultural heritage and a strong humanistic atmosphere for vocational education. It currently has three campuses: Liuying, Chengxi, and Qinquan. The Liuying Campus is located in Liuying Town, north of Santai County, covering an area of 128 acres. The campus is decorated with birds and flowers, and has complete teaching and training equipment. It offers advanced majors such as CNC application technology, rural electrification technology, construction engineering technology, property management, electronic and information technology, computer and e-commerce.

In early August, Greelan Technology Development Co., Ltd. (hereinafter referred to as "Greelan Technology Company") reached a cooperation agreement with Liuying Vocational High School to establish a 60 seat digital language laboratory. The digital language laboratory adopts an adaptive multi-channel digital audio and video real-time packet transmission protocol, combined with advanced semiconductor embedded technology and streaming media technology, to fully store, exchange and transmit audio and video signals in digital stream form between the main control equipment and student terminals, thereby obtaining professional audio effects with a sound delay time of less than 1 ms, The system adopts a standard star shaped network structure, and the main switch supplies power to student terminals through a Category 5e Ethernet cable, while transmitting bidirectional control signals, data information, and high-definition video signals. The convenient network wiring method is simpler, more stable, and secure, and the installation and maintenance are more convenient and efficient, effectively improving the quality and efficiency of teaching. It has been favored by users. Greelan engineers have installed and debugged it on September 6th, and quickly put it into use by customers.

Greelan Technology Company has always adhered to the concept of "positive, simple, happy, professional, honest, and win-win" to serve customers, and to give back to users with fast, efficient, and high-quality products, which has also led to more and more domestic and foreign customers choosing the "Greelan" brand.