Time capsule introduction: In 1970, a stainless steel container with a total weight of 60 tons and tightly wrapped in concrete named "Time Capsule No. 1" was buried in Osaka Castle Park; 8 days later, another identical "Time Capsule" No. 2" is also buried here. There are 2,098 items stored in 29 boxes in the "cabin". As iconic works of modern civilization in the 20th century, these collected items come from the fields of society, culture, art, nature, science and technology, and are scheduled to be opened 5,000 years later. "Time Capsule No. 1" was placed at the bottom and has to wait for 6970 years to be opened; while "Time Capsule No. 2" was opened for the first time in 2000, and will be opened every 100 years thereafter to bear witness to human civilization. development of.