First, in terms of degree of specification about a scale, nonscalar change motion morphemes (e.g., gun "roll") do not provide any information about the scale, open scale motion morphemes (e.g., luo "fall") specify the existence of a scale, whereas (both multi-point and two-point) closed scale motion morphemes such as hui "return" and jin "enter" not only specify the existence of a scale, but also the existence of an endpoint for the scale.
to satisfy the Scalar Specificity Constraint, when these morphemes form a hierarchy to predict morpheme order, they must follow an order as represented by the three boxes with solid-line border in (6).