https://qooah.com/2023/12/12/xiaomi-mijia-launches-39-inch-lcd-blackboard-for-only-239-yuan-2-pieces-can-be-spliced-%e2%80%8b%e2%80%8bto-57-inches-3-pieces-can-be-spliced-%e2%80%8b%e2%80%8bto-78-inches/