Gel Pen Refills 0.5 for Click pens, Quick Drying Ink Pen Refills Black Smooth Writing Pens for Journaling School/Office Supplies (0.5 MM Fine Tip Ink Cartridge, Pack of 10)

This is a really common refill for Chinese pens and you can find numerous listings for comparable refills on Amazon, such as: https://www.amazon.com/CFDXK-Refills-Spring-Writing-Journaling/dp/B0DPH4H7QQ?th=1 White or clear, doesn't matter. I have lots of these same pens from Temu with various bodies/designs and they all take these refills.