I don’t know whether the title “OEM processing” refers to “foreign OEM processing”. "Foreign-related OEM processing" is actually a contract relationship. Domestic processors are entrusted by foreign trademark owners to process goods and affix the trademark of the foreign trademark owner. All goods are exported to the overseas country and are not sold domestically.

It will be easier to understand if you understand this. The biggest difference between the two is that in the former, the "trademark" is only a part of the processing. Domestic processors can only affix corresponding trademarks to the goods commissioned to be produced in accordance with the requirements of the overseas entrusting party. In the latter case, one party obtains trademark rights through trademark licensing and has the right to use the trademark on the designated goods, and the goods can be sold and circulated domestically. Going a step further, the former's income comes from processing fees and has nothing to do with trademarks; while the latter enjoys the value and benefits brought by trademarks.