SL2.1A Docking Station!!

Chip: SL2.1A
Input interface: TYPE-C
Are you still worried about not having enough interfaces?
This docking station can expand 1 USB interface to 4 USB interfaces, increase the interface of the computer, and greatly improve work efficiency!
 
My computer only has two USB-A ports and 2 TYPE-C ports, and the 2.4G receiver of my keyboard and mouse will occupy my 2 USB-A ports, causing me to have to unplug a receiver when I want to plug in a USB flash drive, but the interfaces of the ROG notebook are relatively tight, and it takes a lot of effort to plug and unplug each time. Frequent plugging and unplugging every day can easily cause me to develop a unicorn arm~ 
So I made this USB docking station, and then used a C to C cable to connect the docking station to the TYPE-C port of my computer, and plugged two 2.4G receivers into the docking station, so that I can free up 2 USB-A ports to connect other devices.
This docking station is compatible with A to C and C to C cables, and the TYPE-C input interfaces CC1 and CC2 both have 5.1K resistors.
After I finished soldering, I found some points that can be optimized. The engineering files have been optimized. The USB socket fixed pins are a bit difficult to solder, so I enlarged the pad area, optimized the VCC routing, optimized the crystal ground, added some teardrops to some signal lines, etc. ~ 
Just feel free to make the board! I look forward to the smile on your face when you finish soldering and it works normally after power on~!
 
The QR code can be scanned! !
 
The RGB light is a 0807 package, automatically flashing slowly, without connecting the control chip. After the 44 lights are soldered, they are quite bright, no less than eating a flash bomb.
I am still developing a mini version of this USB expansion dock, the estimated size is 3CM X 4CM, very small! But it will never shrink!
 
The CC2 resistor position in the picture is empty, because after verification, I wanted to try to see if I could use the C to C line by only soldering CC1 without soldering CC2, but the soldering iron burned it, so it is empty. Don't worry, I soldered it after taking the picture (you don't have to buy or solder the P1 pin header, and after soldering, use a multimeter to measure whether VCC and GND are short-circuited)
 
. The BOM table is in the attachment.