What did China get from 1999 South China Sea plane collision?

In fact, this is not even an apology. These are the famous "two regrets", that is, the US side expressed regret for the China pilots and their families and the people of China, and regretted that the US military plane entered China's airspace without permission.

As we all know, the US military plane had enough time to destroy the sensitive equipment and documents on board before landing in Lingshui, but the Chinese side later boarded the plane and detained the American soldiers, which caused great diplomatic obstacles, and most experts thought that it was unlikely that China would get any valuable information and technology from this plane. Subsequently, the plane was dismantled by personnel dispatched by the United States and transported back to Hawaii by a third-party (Russian) plane. It is not known whether Chinese personnel will have the opportunity to contact the plane again during this period. What is known at present is that China still holds the plane black box as a secret. After the incident, China asked the US for compensation of1000000 US dollars, but the US only agreed to pay tens of thousands of US dollars, so the compensation was finally lost.