Hi Jiangtao,
I'm no expert on this, but to me the student/hobbyist/maker market is very different to the "professional engineer" market. You probably need to treat them separately. Professional engineers probably already have an oscilloscope, or could easily find the money to buy a 100MHz/1Gsps oscilloscope. So the real question is why would they spend extra money to change to your product? In addition, unless the company uses some particularly special equipment, engineering time in most western companies is far more expensive than the cost of electronic test equipment (I am not sure if it is this way in China). So people (well, at least the smart ones) will be wary of purchasing unknown equipment that could waste the time of their engineers.
To me personally, anything with less than 1Gsps @ 8bit is not an oscilloscope, regardless of how it is marketed; it is a data logger. The market has simply moved on from that. I don't see myself buying an 8 bit acquisition device with a lower sample rate ever again.
Non-paid testimonials are very important as well; you should contact people like dave jones/eevblog, mikeselectricstuff, etc. These people may not be very visible in China as they are mostly youtube-based, but they are very well regarded elsewhere in my experience. Be aware that these people will tell you exactly what they think (or at least I trust them to do that!); if they think the product is rubbish they will make a video telling everyone that it is rubbish.
Some other points:
- your website seems to just show a forum with garbage posts; most of them are just silly pictures or keyboard mashing. This looks pretty bad.
- the downloads section does not actually have any downloads, and "more details" links do not actually show more details. This also looks pretty bad.
- you may need someone who is a good native english speaker to proofread and correct your documentation and website. Even though I understand there is a language barrier and that it is difficult, if I read documentation with poor english and yet the company is trying to sell me (an english speaker) their product, it looks to me like they just want to take my money and run. It's different in conversation/forums/etc because people realise that you do not have any time to prepare or proofread.
I suggest you look at the picoscope website and forums; after all, they would be your direct competitor. I am a happy picoscope customer myself!
PS: I'm not proud of this last point, but I've noticed that if I see the SimSun type fonts I become immediately suspicious of the accuracy of the documentation. I guess it is because I have used many Chinese electronic products/parts with incorrect or poor quality english documentation, and I have now subconsciously associated that font with poor quality products in general
I've never seen a product from a non-Chinese company that uses that font. Western companies have mistakes in their datasheets too, but they don't all use the same font