Looking for a job, rural hukou also needs a guarantee.

No need. According to the official website of Hualv.com, this account is used to record personal identity information and family relations, and has no direct relationship with work ability and credit status. China's "Labor Law" clearly stipulates that an employer may not refuse to hire or reduce wages due to factors such as household registration, region and gender. So you don't need a guarantee to find a job in a rural hukou.