You make yourself sounding a bit cocky there, don't you think, mapuc?
The point of the parade was to show that they no longer depend on other nations delivering them high tech weaponry. They produce it themselves now.
And the third Vietnam war showed their willigness to take high own losses to win on the military battlefield. They delivered the Vietnamese quite a punishing - and that was thirty years ago,. with old hardware and old military dogmas.
The massacre on the Tienanmen square, killing around 10.000 as recent research says, shows their willingness to play it brutal, if they see the need.
China no longer just copies technical innovations of others. It now is a major source of especially computer and high tech innovation. Huawei is just one example. Foxconn as another.
Reasons enough to be worried. They are spreading thei influence not just by credit-lending and civilian harbours around the globe where they could supply military units as well. In Africa they build more and more military installations as well. Their determination in the South Chinese sea is beyond doubt. They create facts there. Since years. Convincingly enough that the US does nothing to seriously trying to stop them from what they are doing, although it violates international law.