Anyone know Chinese?

Hi, I'm originally from China.

It means "if you are not planning to assemble the engine into the fuselage, don't use J3".

Well, I guess I'll need to test fit it then since that makes no sense. J3 is one of four quarters of the engine tube section. If I lleft the engine out for display, and thus left J3 off, one quarter of the engine in that section would be missing. Hmm.

Thanks for the clarification hou.

Dana F