The whole body is grayish white with round black spots. Is it a poisonous snake? Is it a specific kind of snake? Please answer this question.

According to the picture you provided, this snake is not poisonous. According to the characteristics of the gray-black circle all over the body, I judge that this snake is a jade spotted snake. The jade spotted snake belongs to the snake family, also known as the beautiful snake, and has been renamed the jade spotted beautiful snake. The snake is about 1 m long, with a purple-gray back, three black spots on its head, a row of dozens of black diamond spots in the center of its back, yellow diamond spots in the center and edge, gray-white belly in the west, and black horizontal spots staggered left and right. They live in woodlands in hilly areas, prey on lizards and mice, lay eggs and are nontoxic. Jade spotted snakes are widely distributed in North China, East China and South China of China. However, due to its beautiful appearance, this kind of snake is often caught and sold by human beings, which leads to its decreasing number.