保养 (bǎo yǎng) means to care for something regularly so it stays in good condition — it covers vehicle servicing, skincare, and health upkeep. Unlike 维修 (wéi xiū), which focuses on repairing broken equipment, 保养 is preventive maintenance. For health, 保养 is practical day-to-day care (e.g., moisturizing, exercise), while 养生 (yǎng shēng) refers to the broader Chinese philosophy of nourishing life.