Place the softened cream cheese, white part of green onion, chopped crab sticks, and seasoning in a bowl of a stand mixer or a large mixing bowl.
Mix using a stand mixer or by hand until everything blends together.
Use a cookie cutter to cut all the spring roll wonton skins into a round shape.
Place several wonton skins on a clean work surface (if you want to work in bulk) or a single skin on your hand.
Brush the round edges with water.
Place less than 1 tablespoon of cream cheese filling in the center of each skin.
Use your thumb and index fingers to lift the two edges closest to you, then tightly pinch them together.
Turn the wonton so that the other edge is closest to you. Use your index finger, once again, lift the middle of that edge and pinch it toward the middle.
Carefully seal the edges tightly and ensure all the air inside the crab rangoon is pushed out.
Heat the vegetable oil over medium-high heat in a large pan. When the oil reaches 350F/180C, deep-fry the crab rangoons a few pieces at a time. Do not overcrowd the frying pan, or it will become soggy. Approximately 1 minute for each side (2 minutes total for each rangoon).
The crab rangoon should be crispy and has a light brown color on the outside when done with frying. Remove them from the oil and drain well on a plate lined with paper towels.
Serve hot immediately by themselves or with sweet and sour sauce on the side.