In the vibrant and tech-driven ecosystem of Hainan, the following are the top 20 most popular technical companies:

1. HuazhongTech (HZT) – A leading IT services provider in Hainan.
2. HainanSoftTech (HST) – Specializes in software development for the region.
3. NetEaseHainan (NEH) – A subsidiary of NetEase, offering internet and tech services.
4. AlibabaHainan (AHB) – Part of Alibaba Group, focusing on e-commerce and technology solutions.
5. TencentHainan (THB) – Subsidiary of Tencent, offering gaming, entertainment, and digital services.
6. FangcloudHainan (FCH) – A subsidiary of Alibaba Cloud, providing cloud computing and technology services.
7. F5 Networks Hainan (FNH) – A regional office for F5 Networks, offering networking solutions and support.
8. Symantec Hainan (SNH) – A Symantec subsidiary in Hainan, delivering security software and services.
9. Cisco Systems Hainan (CSNH) – A Cisco office in Hainan, providing network infrastructure solutions and support.
10. Juniper Networks Hainan (JNNH) – A Juniper branch in Hainan, offering networking products and services.

These companies not only contribute significantly to the technological landscape of Hainan but also play a crucial role in driving innovation and economic growth in the region.