Chinese unique roe sauce varieties, by more than 8 years old Kaluga and hybrid sturgeon eggs made of Amur sturgeon. The color of the Black Pearl like a charming color, the particle diameter of 3 mm or more, the entrance can feel the particles plump and round, with rich milk flavor, long aftertaste.

Distribution of wild resources in Heilongjiang River Basin in China, is a freshwater fish in the largest species and need to more than 10 years to its maturity and spawning. Roe sauce has shining iron gray, egg diameter of 3.5 mm or more. Superior taste, is the most expensive price for varieties of roe sauce.

The species is native to the Caspian Sea and The Danube area, made more than 10 years of Russian sturgeon roe. Particles more than showing a bright yellow to gold, particle diameter of 2.9 mm or more. Because the egg membrane is more flexible, the entrance has the sense of blasting, and presents the fresh nut fragrance.