Here is an idea for Siglent:
Identify skilled experts on this forum, and nominate them for an official Beta tester program.
After careful nomination, official Beta testers get free candy like factory sealed Siglent scopes and other shrinkwrapped test gear

I am not saying that this should apply to the high-end models, but it could apply to the sub 300-500 USD range.
Come with a structured approach to report issues in a uniform way. Setup a bug tracking system for the official Beta testers, like ClearDDTS, Bugzilla. Follow up major findings, suggestions for improvements, UX issues and showstopper issues monthly in a limited group conference call.
With all these skilled experts and enthousiasts testing your products, you will win back the investment in no time. Much cheaper than hiring Chinese test engineers

I am willing to sign up as an official Beta tester to show the good example! =)