KanjiJLPT N2
Made In...

made in..., manufacture

Mnemonic

A massive factory system of conveyor belts stitches a tiny Made In... label into every garment that rolls off the line. Without the system, no garment would carry proof of where it was produced — shoppers would riot at every clothing rack!
Additional thoughts
Picture an enormous industrial assembly line (system) automatically sewing origin labels into shirts and coats (garment). The label IS the proof of manufacturing — Made In... links system + garment perfectly.
Quick recall
A factory system sews Made In... labels into every garment.

Details

The keyword for 製 is made in.... This kanji refers to the process of manufacturing or producing something, and it is commonly used to indicate where or how a product was made. It carries the sense of fabrication, production, or construction of goods through a deliberate process. You will often encounter it in labels and descriptions denoting the origin of manufactured items, such as "made in Japan" or "made in America."
On'yomi
せい