ZHENGDONG INDUSTRIAL & TRADING
Pre-owned GPUs & Compute Cards
Tested · Bought · Sold
Every card stress-tested and graded, backed by our warranty. Bulk supply for businesses, and competitive buy-back for your idle GPUs and accelerator cards. We also supply new cyber-security hardware, AI workstations and AI-assisted social-science research services.
Our Business
Three business lines
Hardware trading, enterprise security and AI compute, plus AI-driven research services — from silicon to method.
01
GPUs & compute cards — buy & sell
Pre-owned graphics, compute and accelerator cards: individually tested, graded and warrantied. We also buy your idle cards. Volume pricing and terms available for businesses.
02
New cyber-security products & AI workstations
Brand-new security appliances (including China-made / xinchuang alternatives), AI workstations and servers: multi-GPU compute, model training and inference, on-premise deployment.
03
AI-assisted social science research
AI tools across the research workflow: data cleaning, text and interview coding, quantitative analysis, workflow automation, and methodology training.
Why buy from us
Tested card by cardBurn-in and stress testing; cosmetic grade A/B confirmed before dispatch
Warranty includedReplacement for non-accidental faults; test screenshots on request
Bulk supplyVolume pricing and payment terms for businesses and studios
We buy tooFast quotes for your idle graphics and accelerator cards
Need a volume quote or want to sell?
Tell us the models, quantities and budget — we will come back with pricing and stock availability.