I don’t think that Sid was involved in Chinagate, but he certainly did play a role in some other criminal activities of the Clinton crime family, even before he was formally appointed to a White House job near the start of the second Clinton term.
I'm sorry friend, you're incorrect. Sidney Blumenthal was directly embroiled in Chinagate -month after month and year after year. Blumenthal, a longtime confidante and adviser to the Clintons, helped coach Bill and Hillary's every response to Chinagate questions from investigators, from Congress and even down to supplying daily responses to queries from the press about Chinagate.
Blumenthal knew every aspect of Hillary and Bill's Chinagate treason and more then directly shielded them both.
Search alamo-girl.com / 'High Treason'/ 'People'
(off the top of my head, here's just one immediate connection:
"My Picnic With Bill: How Reporter Gave Clinton Heartburn Over Chinagate"
http://hv.greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=002hE7