If you have a certificate, it depends on whether there is a steel seal. You can check it online. Then the certificate is true, and it says A goods, so it is not dyed. The manual processing of writing is dyeing. Maintenance: If it doesn't need rain, the maintenance of jade has "three taboos and four fears", and the "three taboos" are taboo, greasy and dirty. Jade should avoid fishy smell and avoid contact with objects with fishy smell. Salty and fishy smell can easily hurt jade. Doctor of Laws/Doctor

Jade avoids oil, and some places where ancient jade is buried are often greasy because of insufficient ground, which makes the clear light opaque. Some people play with jade and like to rub it with face oil and hair oil. Even rubbing lard on jade. Can change ancient jade into oil. In fact, these oils prevented the ancient jade from being completely exposed and became a kind of "closed", which could not make it moist. Experienced jade experts, who have been playing with jade for a long time, are afraid to give it oil. Every once in a while, they wash it with water or hot tea to remove oil and maintain it, so that the jade can be truly moistened. $ # 7 # 0`; eight

Jade should avoid filth. Disrupting jade with filthy hands will block the earth door of ancient jade, and the dust buried in jade cannot be withdrawn. Even if you play everyday, it is futile and even self-defeating. _LZ(HTX~

"Four Fear" refers to fear of ice, fire, Jiang Shui and falling. Njg87tKB

Afraid of ice, because ancient jade often comes into contact with ice, the earthen door is damaged, and the jade theory cannot be highlighted, so it will not live and become a "dead color." 2'=)ese

Afraid of fire, if ancient jade is often close to fire, the color paste will fade. Fire is different from natural geothermal. After a long period of natural geothermal steaming, ancient jade softened and changed, and then it was slowly invaded by Seqin. w-JWMg Y8w

Afraid of Jiang Shui, some people think that soaking ancient jade in Jiang Shui can remove fishy smell, but it is not. When the ancient jade comes into contact with Jiang Shui, the existing color will become dull. If soaked for too long, it will make the whole body numb. Although I played it in the future, it is difficult to remedy it. Ud+，/pE & gt； The fourth note of the major scale

Afraid of falling, as we all know, although jade has high hardness, it is easy to crack after being hit. Sometimes, although invisible to the naked eye, there are dark cracks in it, which greatly damages its perfection and economic value.