The Chinese Embassy in Berlin demanded Friday that a German online retailer stop selling a line of T-shirts with slogans it says are insulting to China.

The offerings from retailer Spreadshirt.de include T-shirts with slogans like "Save a dog, Eat a Chinese," ''Save a shark, Eat a Chinese," and an image of two faux Chinese alphabet characters having sex, with the caption "Now I understand Chinese."

The embassy said in a statement that it has complained to the German government and is seeking an apology, an explanation and for the offending shirts to be pulled.

However, the head of the Leipzig-based company, Philip Rooke, said he planned to keep the disputed designs available for purchase.

Rooke said his company provides an "open platform" for people to create and share ideas on merchandise, and "in a few cases, some people may find a design controversial while others do not."