Although I agree with both points, I think they are secondary to the ongoing loss of economic vitality that comes from the slow but steady loss of manufacturing capability (which despite what politicians say is not really about job losses).
At issue is the idea that the knowledge required to manufacture things is either trivial or easily acquired. While that may be true for certain goods, it is not for many energy and industrial goods, products, and processes.
China has become the best place to get an answer to the following question: How can a new product, an invention, be translated into something that can be manufactured or used profitably? That represents a significant loss of value to Western economies, even if it represents a substantial opportunity for specific companies to boost their bottom line through outsourcing (this is management teams thinking economically, but not in terms of political economy).
China is now a manufacturing powerhouse, not because of cheap factors of production; that's only where it started, but because they have mastered a highly innovative and knowledge-intensive proprietary skill set distinct from the capabilities involved in invention and innovation but no less critical.
While most of the profit for some innovations may continue to accrue to Western companies, in some instances, regardless of where the product is manufactured, this skill set has allowed Chinese firms to make inroads with their products of equal and sometimes superior quality to Western products. (See EVs, Solar).
Combined with the large domestic market, that ability to manufacture faster, cheaper, and better acts as a flywheel that enables Chinese firms to level up, enhance productivity, and build sequentially from imitator to peer and finally to leading innovator.
In the 1960s, the Soviet Union's understanding of semiconductors was on par with the US; they fell behind because our companies moved from one-off production of a value-added innovation to mass production. The manufacturing helped create an ecosystem that produced further innovation and demand for innovation…Silicon Valley.
An innovation ecosystem does not need to be co-located, and in the West, they are not, but they do depend on the free exchange of ideas, something that China does not excel at.
Returning to the case of MAN, I have no idea if their turbines represent a security threat, but I do know that China has yet to crack the code for manufacturing high-quality gas turbines. They understand the science, but that is not the same thing as being able to manufacture, for example, a turbine that can start up in 11 minutes, has a blades spinning at 3,600 RPM, in an exhaust stream that is 600c, can but turned on and off a million times and only needs to be serviced every 32,000 operating hours. Knowing the science behind that turbine is different than knowing how to build it, and we are ceding that knowledge to China right and left.