Dear Sir,

We know about you from the internet.

Ningbo Riye Electrical Appliance Co., Ltd. was established in 1991, as
an enterprise of joint venture with foreign investments from Japan, in
2009, we developed our Yesidoo instant type purifying electric water
heaters which are more human natural, more intelligent and safer. The
following are some introduction about our products...

That's a good one that is.