Hong Kong’s second largest public housing provider has announced a 10 per cent rent rise as it faces a rising repair bill for ageing estates. The Hong Kong Housing Society (HKHS), an independent and non-profit organisation which operates 20 rental estates citywide, announced on Wednesday it had approved the increase. “Well-off tenants” – those whose income and assets exceeded certain thresholds – will start paying the new rents in October, while the others will be exempt until January. The new measures will see tenants in Group A estates, which cater to low-income families, pay an extra HK$230…