Chinese 3D Print Huge aircraft parts

[checktest]

There are obvious tool marks on the part from subtractive CNC milling. Any information on whether the machining was done as a secondary operation after the part was printed?

[corski67]

The cutter marks made me wonder as well because this looks exactly like a traditionally machined part made with "subtractive" manufacturing processes. If the supposed 3D printed part still needs to be machined, the "breakthrough" is lost on me. Machining requires tooling and nearly all the traditional headaches that go with it. I don't trust the Chinese and so I don't trust that this is actually the breakthrough in 3D printing technology as it is being touted. Let's see the 3D printed part instead of something that has obviously been machined just the same way it has always been done. I find it very odd that they would put these pictures out there as representation of their breakthrough.