I want to know the answer to the following question:
When did Longtan Containers Port Area open up?
All the background I'm provided with is that "Nanjing is also the biggest container port along the Yangtze River; in March 2004, the one million container-capacity base, Longtan Containers Port Area opened, further consolidating Nanjing as the leading port in the region.". Is that enough to answer the question?
Answer: yes