The permanent cemetery is at que Stone's. I just went there a few days ago. You don't have to send flowers to Tomb-Sweeping Day. It's okay to miss your loved ones. You don't have to pay. It's convenient to go to the permanent cemetery by car directly to your door. Bus no.36 is also fast. You can see it after crossing the Queshi Bridge.
0754-88452289 Some people say 20 years, others say 10. There's a phone call about cemetery information. You'd better call and ask.
I hope this helps.