The Impact of Intergenerational Support on the Elderly&rsquo;s Life Satisfaction in China: A Comparison of Males and Females^{<a class="tippyShow" data-tippy-arrow="true" data-tippy-content="Supported by “the Fundamental Research Funds for CUFE Faculty and Students”." data-tippy-interactive="true" data-tippy-theme="light-border" style="cursor:pointer">1</a>}