PPP is more like a "number game" to entertain the low-wage country. The magic of PPP only works in very simple business, e.g. hire a maid to clean the house for you, or hair-cutting. However, when coming to industrial area, PPP actually means nothing.
Do you think the PPP magic works when you buy the crude oil from Saudi, or iron ore from Brazil, or construction equipment from Caterpillar, cars from Toyota, telecom equipment from Huawei, smartphones from Xiaomi, fighters from Dassaualt, planes from Boeing, or trains from Hitachi?