You might think 4 mins is quick but you could have easily made a 3min palace. This map is bunkery right, all you need is a tox tunnel at each bridge bit and 2/3 quads, then in combination with your rpg you will see off any early game threat of chinav.
Then just make 1 bus, and send it in down bottom with 5/6 quads for the helix and its gg.
China is trash vs gla tech. Your bus wrecks it, just defend it vs helix with quads.