Hmmm, I must say my family is really lucky to have PRC relative who do not demand anything much from us.
My granddad is the youngest kid of my great granddad's 4th wife and my dad is the only child. All he has is an adopted sis still in hainam dao but she is a v understanding sis. Never asked us for any help (no TV, no fridge, no watches etc) except when her crops are destroyed in the floods or typhoon. At most only asked for some cash to re-plant them.
The other siblings of my granddad are mostly quite ok, teachers, bankers, shop keepers etc, so never heard from them asking for anything, frankly speaking.