The advantage of WS2812B-5050RGB-8X8 light board is that it can be spliced infinitely by yourself. The picture below is a 16X16 light board that I made myself (there was a little accident during the welding process, and it turned a little yellow.)
When the boards are directly connected, you can solder several pin headers to increase the strength between the boards (I tested it myself, and it will not disconnect normally as long as I don't break it very hard).
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