Where can I buy a waterproof bag for mobile phones in Zhengzhou?

Zhengzhou Mobile Phone Waterproof Bao Yin Mobile Phone Repair Center (Longhu Wanjia Plaza Store) is available for sale. Inquiring about the sales list of Ziyin Mobile Phone Repair Center (Longhu Wanjia Plaza Store) shows that Ziyin Mobile Phone Repair Center (Longhu Wanjia Plaza Store) sells mobile phone waterproof bags, so Zhengzhou Mobile Phone Waterproof Bag Yin Mobile Phone Repair Center (Longhu Wanjia Plaza Store) sells them. Mobile phone waterproof bag is a device to prevent mobile phone from entering water.