What is the survival capacity of Gan Long rotating heart bottle?

No more than ten bottles of dry dragon revolving heart. According to the relevant public information, it is recorded in the literature of Qing Dynasty that there are very few bottles in the world. In the eighth, eleventh, twelfth, eighteenth and twenty-two years of Qianlong, twenty or thirty rotary bottles were produced in the Imperial Kiln, and there are only ten at present. Due to the long time, many rotary bottles have been damaged or even disappeared.