They are long and skinny from stretching for light. They are likely stretching for the reason stated above, poor lighting. Another cause for stretching is the light being hung so far away, hang it 3-4 inches over the top, and let the plant and light gain height together. I'm not an indoor grower but I do slightly understand the stretching with artificial light. Also, I second the recommendation of not trying a grow in any country governed like China, especially China. There are states in the U.S. that carry a felony charge for a single seed, and I wouldn't attempt growing in those places either.