[quote=“Doraemonster”]Just some suggestions, in no particular order:
Try to get your place listed on some local Yelp-like websites, I think this one is the largest: ipeen.com.tw/ and also get some people to review it.
On your website, on the “Contact Us”/“連絡我們” page you could put an embedded Google map.
Just FYI, when I search for your address on Google maps, it shows a totally different place. It’s Google’s fault, not yours, but for some people it might make it difficult to find you. Consider also giving out the numeric co-ordinates, I think these are: 25.254969581606, 121.47421074436. This way Google can show your actual location.
Also, while you only give the driving directions, there’s also a bus stop nearby called 北勢溪口, with the following buses: 821, 860, 861, 862, 863, 864, 865, 867, 879, 882, 892, of which 860 and 863 seem to go reasonably often. This information might encourage more people to visit and it costs you nothing to put it somewhere on your website. Bus schedules can be checked here: e-bus.ntpc.gov.tw/
If you don’t mind the publicity, putting your photo somewhere on the website could do wonders to attract the local clientele.
There’s the German Chamber of Commerce in Taipei which might be useful to get in touch with: taiwan.ahk.de/ (but I guess this you already know).
Good luck!
BTW Last Sunday I went to Paulaner at the Arts University in Guandu, basically to have a beer. While the beer is good there, I also got a few slices of moulded bread with it for about $200, which were replaced with 4 diminutive nondescript rock-like pretzels after I complained. Add to that the standard Taiwanese (lack of) quality of service and zero ambience while the grand total shot up to nearly $2k for two people. Really wish I paid you a visit instead.
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Thanks so much for your sharing ideas, for general information, this project is done by one foreigner only, there is no local involved and beside a weekend-volunteer doing some translation work we run this place as a one-man company.
The location has the problem, that it has no address, or better saying it has many addresses. (Letters arriving have all different naming). Sanzhi government has one definition, New Taipei City has another, the locals have a third one. And Google? We are working on getting this POI registered finally for 3 months now, it stills doesn’t appear. It is there but you have to search for it with the German name “Am Strand”. Your advice to show on website is being processed currently like the mentioning of bus routes.
We want to have local TV channels to review us, report about and promote us, there are steps done to make this possible even without knowledge of Chinese language. We are listed on platforms like Openrice, TripAdvisor but continue to get listed in more, local platforms.
When the boss, cook, server, website designer, buyer, dishwasher and blogger has shaved finally we will post an inviting picture of him online, be sure. 
Your last remark is the most interesting, as it matches our experiences, and is one of the reasons to run this business in Taiwan. We believe there is a demand for a change in how people eat and drink. Current scandals show how much there is a need for changes, a return to the basics, a return to slow food, a return to enjoying times of eating. The taste is still the most natural proof you are eating good. We just unlearned how to taste, which can be relearned again. We believe that we can show, and teach people this ability again. We hope to see you one day At The Beach to make this bad experience about German food be wiped out, yet leaving your budget on a reasonable level.