Reliable. The Pinduoduo Haichang brand is officially authentic and belongs to the flagship store’s official website. Haichang Contact Lenses generally refers to Haichang Contact Lenses Co., Ltd. Haichang - a company with a patent for the centrifugal casting method to produce contact lenses; Haichang - a professional foreign-funded enterprise that has entered China's soft contact lens market; a large-scale group company that comprehensively and mass-produces contact lenses, glasses and spectacles processing equipment in China .