Nowadays, yu Chan makes false wind be current, to avoid to be deceived, avoid needless pecuniary loss, the author induces roughly the following consult for the person that experience hides the sea firstOne, beware the management technique that contains con sex, certain pedlar often makes up to hawk the business dramatic narrative, the Yu Chan that tells about him is hand down from ancestors or come from the gouge in ancestor grave, tell measured, vivid and dramatic, lifelike, will prove jade cicada antecedents is authentic with this, a few person classics that do not have experience do not live their fair-spoken, be decieved very easily be duped, accordingly, first avoid by all means of jade cicada lover is credulous, enter town blindly, move easily2, beware the person that make a holiday plays tricks on material of ancient jade cicada, they are commonly used and similar the stuff with simple jade pretends to be Yu Chan, change one's appearance, mix the false with the genuine, baconian rise to have roughly below 3 kinds of circumstancesOne of, with Shi Chongyu, if use horse's hoof,stone talent pretends to be jade simple stuff, examine the way with jade and the simplest stone, it is to use one penknife to engrave equalize to fall gently in its brim place, be like those who have mark of apparent cutting tool is stone simple stuff, true jade cicada quality of a material is solid, hardness is amounted to 6, 6.5 class, general metal cutting tool is basic cannot scoreSecondly, fill jade with glass, if use vitreous stone and so on to pretend to be emerald Baiyu crystal to wait, mimic of this kind of glass, can observe with naked eye inside have makings bubble, can see in place of decorative pattern brim its have grind arenaceous granule, the structure is arranged loose, lack compact sex of Yu Chan and tough sexThirdly, replace Yu Chan with tool set of high polymer material, this kind of false Yu Chan does not pass the test of scientific instrument equipment to identify hard commonly, the key looks implement the watch has without natural Yu Wen and jade muscle3, beware the person that make a holiday plays trick on chromaticness, they use all sorts of technique, confrontation second Yu Chan material " disguise dresses up " , make achieve the chromaticness result like Zhen Yuchan surface, cheat dilettante, yu Chan's colour and lustre is the natural attribute of jade, true Gu Yu nothing more than have two kinds, namely " Gu Yu of be handed down from ancient times " and " come up out of land Gu Yu " , antique industry with " Gu Yu of be handed down from ancient times " have deny " bag oar " " come up out of land Gu Yu " have deny " ooze color " , as the important basis that distinguishs jade objectCicada of jade of general be handed down from ancient times erodes the soak that reachs a secretion of fluid of the synthetic perspiration when playing through long-term air, the oil that Yu Chan's surface can produce a bright and clean moist dried meat, common says " bag oar " , the person that be modelled on wraps an oar to want to have, in its the surface is oiled, brush with the brush, repass is artificial hand dish sweat is brushed also can produce packet of starch, but this film is very dilettante, not grumous, the old package oar with as antediluvian as surface of true jade cicada grumous Chinese hackberrya differs completelyCome up out of land together Gu Yuchan gets all sorts of subterranean material for a long time erode, suffer the suffocating that the ground enrages, internal matter can produce Yu Chan a few change, if appear " earth becomes rusty " " earthy spot " wait for all sorts of color, common says " ooze color " , the person that make a holiday has ooze quality to achieve Yu Chan to go up, the Xin Yuchan that be modelled on it is evaporate, frowsty first, burn, decoct blast, be caught with animal blood next or undertake cankerous with nitric acid, it is its bury again in earth period of time, when be being taken out, also can arise " ooze color " , but the ooze scene that makes a holiday is factitious, besmear goes up sensory resembling, color is markedder, the Gu Yuchan that comes up out of land truly, because pass 100000 corrode permeate, ooze color is more natural and even, contain old gas