Zhenque Youqing recognized the trademark of Queyou, a brand of Matsuoka Electromechanical (China) Co., Ltd., which was established at 1995. Its headquarters is located in Xiaoshan, Zhejiang. The sparrow friend's logo has three similar diagonal lines, and the middle one is composed of a bird logo with a hollow origin with the word "sparrow friend" on it (some fake people will add words, but the real sparrow friend only has two words). English is TREYO, and the brand slogan is.

True sparrow friend, from the packaging box, base, column, outer frame, suede, color board, there is sparrow friend's unique symbol string code under the internal host, so you can see the production time.

Mahjong machine was born in Japan. The surface of the back of mahjong tiles contains magnets and other things that can be attracted by magnetic force. Automatic shuffling by magnetic force.

When the origin of mahjong was still inconclusive, Ningbo school adopted the method of secretly crossing Chen Cang. Ningbo people, who have always been good at attracting investment, believe in preemption. While others are still arguing, the clever Ningbo people have quietly built a mahjong museum next to Tianyi Pavilion, saying that Ningbo is the real origin of mahjong.