Passenger ship lock introduction: Walk along Wulongtan Park to the north end of the park, and you will come to the first passenger ship lock in Jinan history. The ship lock is not only the transportation hub of the moat, but also the most important node of the entire navigation project. It can digest the water level difference of more than two meters between the upstream and downstream. It can also be quickly opened when the flood arrives to release the flood, which is of great significance.