Several red flags with zehan-invest.ch / zehan-invest.com: (1) They promise unrealistically high returns, (2) They're not registered with Swiss Financial Market Supervisory Authority, (3) Their contact information is vague, (4) They pressure you to deposit quickly. I recommend everyone do thorough due diligence before investing with any company.
Pros: Website looks legitimate on the surface
Cons: Listed in warning databases|No transparency|Pressure to invest quickly