Hi liudengyuand,
if with quartz disconnected you have a DC output (more than 6V at C1
means the the stage is auto oscillating, so you have to reduce the gain by reducing C13 and / or C14. if with quartz disconnected you don't have a DC output disconnect C4 and connect quartz and if there is more than 6V DC output (this is your current case, I think) means that there is a parasite coupling and/or too much gain then reduce C13 and / or C14. It's better a double side PCB with the lower side connected to ground.
Best Regards