Founder-side decision relevance
The useful question is whether one specific service changes a measured engineering bottleneck. A visit or scoped test can precede a permanent node.
Signal
A launched carrier is a more concrete lead than a general industry ambition. It identifies an operator and service categories to investigate; it does not establish that a particular project has access.
Which route changes?
A team that already has a prototype but lacks independent evaluation or application feedback can investigate a bounded Haidian test. A team whose bottleneck is manufacturing cost should still compare the relevant supplier ecosystem.
Smallest useful next step
Prepare the current baseline, one technical question and the evidence a successful test must produce. Agree the task, owner, budget and deadline with the host. Expand only if the result improves the next revision.