Agreed, these things are not only limited to chinese here but also for European engineers for example our private industries of textile and goods "if" they are using some latest machinery from west they would require engineers from their also if something went wrong in machinery if the problem cant be solved by our engineers and believe me or not mf's charge thousand of $ per hour whether they are working or not lol.
In China, the average salary for a technical engineer ranges from 10,000 to 100,000 RMB per month. A few senior engineers can earn 100,000 to 1,000,000 RMB per month, and a very few can exceed 1,000,000 RMB per month.
If an engineer is sent from China to Pakistan to handle technical issues, their salary will need to be doubled, typically 1.5x to 3x their salary. This includes travel expenses such as transportation, food, and lodging, as well as a reasonable amount of company profit.
This is a normal salary structure for expatriate engineers.
If the final salary paid is several times this amount, then there are significant hidden costs involved.
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In many countries, local officials are prone to widespread corruption, especially among smaller government officials. When Chinese companies conduct business in these countries, local officials often demand large bribes. Typically, the Chinese companies pay these fees, but these expenses are included in their costs and ultimately reflected in the Chinese companies' quotes.
However, the net profit of these Chinese companies remains at a reasonable level. Otherwise, their living space will be squeezed out by other Chinese companies.