Horizontal communication and vertical communication are two instrumental communication styles in the process of building social capital. Horizontal communication refers to the process in which an individual establishes extensive connections with groups with similar social status around him, while vertical communication refers to the process in which an individual establishes relationships actively with groups in the society dominated by dominant resources.
 Liu is very satisfied with his family's nanny. In order to let the nanny after the spring festival to continue to come to work, he gave the nanny visit round-trip tickets is according to the above definition, vertical communication.