Sharing about the work of "reviving" trees in Hanoi, Mr. Nguyen The Cong, Deputy Director of the Department of Construction, said that the city is expected to have about 3,500 - 4,000 trees that can be "saved", including more than 100 rare trees, heritage trees, preserved trees, ancient trees; 9 red sưa trees are rare and valuable trees; 94 heritage trees, preserved trees, ancient trees such as sanh, si, da, de in the area around Hoan Kiem Lake, Ba Kieu Temple, in historical, cultural relics... Up to now, Hanoi has replanted about 80% of the above trees and the replanted trees are all safe when following the steps of agricultural tree reconstruction.