Xiamen metro line opens with 4 km undersea tunnel
https://www.railwaygazette.com/operations-and-services/xiamen-metro-line-opens-with-4-km-undersea-tunnel/59389.article
Xiamen Island is connected with Mainland with Metro Line 1 toward North, and with Metro Line 2 toward West. But, there was not Metro Line toward East from the Island. This time, Metro Line 3 plays a role as the line for Eastbound.
