Chong-Zhen is a ChatGPT subscription top-up service. Choose Plus, Pro 10x or Pro 20x, pay with Alipay, and the plan is activated on your own account, usually within 1-3 minutes. It suits users without a USD card. Invoices and company bank transfers are available, and every order has a 30-day guarantee. The site also has a plan-by-plan price comparison, GPT-6 model notes, and guides for Codex limits, invoices and cancelling a subscription.