For residential buildings with elevators, real estate development enterprises pay the cost of 4% per square meter of construction area; For houses without elevators, real estate development enterprises shall pay 3% of the construction area per square meter.
For the house with elevator installed, the purchaser shall pay 3% of the cost price per square meter of construction area; For houses without elevators, the purchaser shall pay 2% of the cost price per square meter of construction area.
If interest rates fall, what impact will it have on bonds?