Frankfurt Technology Co. Ltd.

I'm not trying to score a Godwin point, but the first thing I think of when I see the symbol, associated to a well-known German city, is a swastika. I'm sure this certainly not what you were going for, and it looks more like the Hindu symbol rather than the nazi one, but most people don't make the difference, unfortunately.

Typography wise, this is pretty good. You might to fine tune the kerning, but that serif font works pretty well with the sans serif one below.

Yeah, I noticed a swastika right away. It's quite unfortunate that its negative connotations overshadow the benign ones. But that might be something to seriously consider.

"Frankfurt" can stand to be a shade thicker, if possible. There are some places where the beautiful serifs on that font get a tad lost. I'd like to see them stand out a little bit further. Great job here overall.

Hehehe..... I see what you did there! Oh... wait... no, you shouldn't do that!

Try bringing in the arms of the f, and make them thinner. should help with the swastika

As stated above, it's a few shades of colour away from this:

http://imgur.com/MIYRWjN

The typographic contrast between the title and subtitle is aesthetically spot on!