有什么具体问题具体问，不要问一个问题让别人写一篇论文回答。

https://www.talkovlaw.com/types-of-co-ownership-in-california/#:~:text=A%20joint%20tenancy%20is%20a,equal%20share%20of%20the%20property.

https://homeguides.sfgate.com/california-tenants-common-vs-joint-tenants-6859.html

If you can read English, study the articles above and