How can I complete Craft 1 Golden Part ?

Parts are crafted in the Parts Factory Building. Depending on the level you will be able to craft parts for one of the sets of vehicle improvement parts that you can apply to your APC's to improve their performance. The basic set is the Trail blazer set for improved gathering. One you upgrade the building you can then also craft other set parts.

You need to produce materials first in the same building or by buying parts chests for diamonds or Energy Fragments. You then combine these materials until you have enough to craft the parts. It will take a lot of low level parts (that you can make) to combine into the highest level gold materials and then craft the gold level parts for this task.