There is a series of pictures doing the Beijing office worker email circuit. They were sent to Danwei.org captioned "Descendants of Mao Zedong and Jiang Jieshi (Chiang Kai-shek)".

This is Mao Xinyu, grandson of the Great Helmsman.

This is Mao Xinyu signing copies of his book Grandpa Mao Zedong (yeye mao zedong).

The pictures below show a guy indentified in the TV subtitles as "golden bachelor" Jiang Youchang.

And then there is this guy, whose name is not on the image. Or is this just another picture of Jiang Youchang? The subtitles on the TV screen are in complex characters, so we can assume this guy is a Jiang, not a Mao.

If any reader knows anything about the above two individuals, please email it to jeremy @ danwei.org for publication here.

There are articles about Mao Xinyu in Chinese here (with another charming photo), here and here.

English articles about him are here, here and here.

UPDATE FROM READER'S EMAIL:
The grandson of Mao is Mao Xinyu, not Mao Xinning. The Chinese character Yu (two horizontal trokes) was mistaken for Ning (only one stroke) [mistake corrected above].

The 3rd and 4th photos should be all ascribed to Jiang (Chiang) Youchang, as the caption suggests. However, his official version of name is unknown. I would suggest Chiang You-chang.

You-chang has two younger brothers: You-pai and You-ching.