Hello, landlord, Gannan Mahjong chess and card game development, first of all, we need to understand the background, personnel and professionalism of the chess and card development company. Secondly, most formal companies have demonstration cases, so you must spend time testing the demonstration products of chess and card developers to see the successful cases. Finally, the stability of the game platform, whether the pictures are exquisite and timely after-sales service, and whether the problems of chess and card games can be solved in a timely manner are also very critical. It is very necessary to choose professional chess and card game development companies, high-quality servers and security systems. Don't buy servers and security software with poor defense performance at a low price. For example, Dayou Network is more professional and reliable in this respect. If you are interested, you can go to consult and understand to meet the needs of customers. Is a trustworthy company