Jellyfish Net, April 2nd (reporter Xiaojiao, correspondent Yan Yong) There is a legend that elderly people locally in Yantai might still remember: in ancient times, when people reached the age of 60, they would be buried alive by their children. Because 60 years make up one Jiazi cycle, this gave rise to the saying "at sixty, change the Jiazi". The living tomb where the elderly person stayed was called "Muzi Grave"...