After ten years of success and failure, we have a correct understanding of "focusing on economic construction" and have found a way to promote reform and opening up. Everyone knows that this understanding and this road are not easy to come by. We must double our cherished, and we must not waver at any time. However, from the first day of reform and opening up, we attach great importance to the construction of spiritual civilization while attaching great importance to economic construction. If only the former and the latter are not, there is no Chinese characteristic. socialism. What is the main point supported by this passage? ['"Economic construction as the center" is a hard-won correct understanding.', 'Economic construction has gone up, and spiritual civilization must be done well.', 'The simultaneous development of economic construction and spiritual civilization construction is socialism with Chinese characteristics.', 'Socialism with Chinese characteristics must adhere to economic construction as the center.']