Reliable. Zhongjing Wanjia is a registered trademark brand of China Water Purification Service Network. The company was established on September 5, 20 15, 15. According to official website's inquiry, this company is a regular water purifier company protected by official website's certification law, so it is very reliable. The company is mainly engaged in the sales, installation, after-sales and maintenance of water purifiers. The effect is very good and is deeply loved by the masses.