I already have a working PHP script and I now need it linked to a Chinese payment gateway. I’m flexible on the processor—custom payment gateway api will all work—so long as you can get one of them fully operational on my server. Beyond the gateway hook-up, I want a few light touches to tidy the code: • Minor UI adjustments so the checkout screens match the rest of my site’s styling. • Small functionality enhancements to streamline the payment flow. • A sweep for any lingering bugs you spot while integrating. Please keep the existing architecture intact; I don’t want a full rebuild, just concise edits that make the script stable and production-ready. Deliverables are the updated PHP files, any new config or callback scripts, and a brief README outlining installation steps and credentials I need to request on my side. If this is something you can turn around quickly, let’s talk details and get started right away.