The power board has been received, soldered, and tested successfully. The signal board has also been connected, and the overall circuit is functioning properly as expected.

However, I feel there are still some details that need refinement, so I made some minor adjustments to the circuit today and am preparing to send it to the factory again. In fact, this round of adjustments doesn't involve significant changes to the circuit's functionality; it mainly focuses on fine-tuning the layout of the ICs to make it more suitable for manual soldering.