Google China has formally released its new online advertisement product Google AdSense for Chinese small and medium enterprises.

Liu Yun, the newly appointed vice president of Google, says that the company did not pay much attention to the advertisement demand of SMEs in the past, but they will engage the market from now on.

Google AdSense works by registering key words as an advertisement and then placing them on the website of each of Google's partners so that users can view them when using an online search. Google says that more than one million websites across the world have joined its AdSense network and daily clicks total about 35 billion.

With the launch of this new service, Google has fully joined the fierce competition in the China's Internet advertisement market that features about 500,000 SMEs.