More and more overseas customers are unwilling to meet first or discuss before viewing the catalog. Is there a problem with my development approach?

It's not a problem with your development approach, but rather a fundamental shift in buyer behavior. According to Gartner research, as many as 75% of B2B buyers prefer a "no-sales-involvement" experience during the exploration phase — they want to search specifications, compare conditions, and make preliminary assessments on their own before deciding whether it's worth reaching out. If your information only exists in your sales team's emails or PDF catalogs and must be requested upfront, buyers typically won't ask; they'll simply contact a competitor instead. The solution is to put key information front and center: let customers find specs, MOQ, and basic quotation conditions before they contact you, lowering the barrier for them to reach out. This is how you retain this new generation of procurement decision-makers who prefer self-service.