Online social capital is nascent, in definition and scope. Our preliminary work [33] attempted to examine online social capital in two extremes ,high and low ,and different from this work , it is limited to the extraction of basic features ,derived from the content and sentiment, for classification among capital groups. [23]proposeabroaddefinitionofsocialcapital—acombination of user profile information, factors reflecting openness to new acquaintances,onlineactivitiessuchasfrequencyofpostingor commenting and the contribution of the user to relationships