Bank SinoPac spokeswoman Chen Ting-ju declined to disclose details of the deal with ICBC.

WSJ: ICBC's Stake in SinoPac Won't Open Taiwan Spigot

The one thing SinoPac won't get, though, is exclusive access to ICBC's distribution channels in China, Mr. Chang said.

WSJ: ICBC's Stake in SinoPac Won't Open Taiwan Spigot

For SinoPac, one clear benefit would be tapping ICBC's network of bank branches to raise its profile in China, analysts said.

WSJ: ICBC's Stake in SinoPac Won't Open Taiwan Spigot