✔ 最佳答案
The sandglass in JungDongJin 正東津 Sandglass Park was built in 1999 by the cooperation between GangNeung City 강릉시 and SamSeong Electronic to commemorate the year 2000.
The building cost is 1280 million Won.
It is the biggest Sanglass in the world and this record is recognised by the Guiness Record.
It will take exactly one year for all the sand in the sandglass to fall down. And then in the next year from 1 January at 0am, the sandglass will rotate for half round and starts all over again.
You may see the reason written here in GangNeung City webpage:
http://www.gntour.go.kr/CMSView.do?pid=2296&upPid=2278&cpage=1
Sorry, only found one sentence on the reason.
l went to JungDongJin 正東津 offcial site but there is no explanation of the reason.
you may go and see: http:/
www.jungdong.com