As to the trading ring, the author suggests that Shanghai Futures Exchange should be our first choice.

关于交易场所的选择，本文认为上海期货交易所应是首选。

youdao

It was the beginning of an insider trading ring that would last 17 years.

FORBES: Inside Trader, Garrett Bauer, Sentenced to 9 Years in Prison

In practice, for an insider trading ring to be effective, there need to be insiders who have access to confidential information.

FORBES: Just When We Thought It Was Over, Another Insider Trading Indictment

At the center of the Galleon insider trading ring are Raj Rajaratnam, Galleon founder, and Danielle Chiesi of New Castle Partners.

FORBES: The Galleon Net Widens -- Insider Trading or Witch Hunt?