Authenticity,Repairing the Old Like the Old

new-generation-old reservoir-old sealing formation

Old Day Embedded in Old Dictionary

old oil =old crude

old well in old field

Remain old appearances of old buildings in restora

repair the old as old

dam and dam foundation

Lung-Hsi Dam and Mu-Kua Dam

Three Gorges Dam and Gezhouba Dam

“Thousand year old”duck eggs

≤40 years old

≥55 years old

0 - 4-year-old children

0～5 old years of children

0~6-year-old children

0-3 years old children

1 year old

10 years old group