Abstract: The two cultivars were introduced in the spring of 1979,and planted in the temperate zone of north China and the south subtropical zone of Huaihe since 1980. The result from seven years observation as follow: 1. Resistance to Frigidity:The two cultivars have the similarities on physiology ecology and adaptable to growing regions.Its trunks are chapped by cold,'Luisa Avanzo' is less serious than'Cima' after 5 years old in Baoding Prefecture. 2. Resistance to Pest:Saperda populnea L,damages trunks seriously after planted 2—3 years,the damage becomes less serious late. 3. Resistance to Diseases:The cultivars are resistant to leaf diseases strongly in the temperate zone,however,this resistance becomes weak to the south of the subtropical zone of 32°58'N,and leaf diseases damage happens. 4. Growth:At 7 years old,the breast high diameter of 'Luisa Avanzo'reaches 28.2cm,17.4m in height;'Cima'28.7cm,7.5m in height,however,for the check cultivar——Ⅰ-214,the brest high diameter reaches 24.5cm and 15.8m in height only. In general,volume increase of the two cultivars is almost the same. ??which increase 30—100% than that of the check cultivar. 5. Suitable Region:The area of south of Beijing and north of Huaihe(the north temperate zone)is the suitable region. 'Luisa'possess high resistance to frigid,therefore,it can be planted in Beijing and Tianjin area;'Cima'posses less resistance to frigid and the northen limited boundary line is near to Baoding city.The two cultivars have been planted in 200 hec.