DNS forwarder Problems

DNS forwarder-general Linux technology-Linux technology and application information. For details, refer to the following section. In Linux, there are two types of DNS forwarding service: Global Forwarding and conditional forwarding.
Global Forwarding needs to add the following three options to the option of the/etc/named. caching-nameserver.conf File
Recursion yes // recursive query allowed
Forward only // forward only
Forwarders {address of the DNS server to be forwarded ;};
Configure the/etc/named. rfc1912.zone file for conditional forwarding, and add
Zone "specified domain "{
Type forward;
Forwarders {address of the DNS server to be forwarded ;};
};
However, I still cannot resolve the issue based on the above method. What else do I need to pay attention? Hope experienced prawns can help me

If my local DNS stores the record I want to query, But I configure this DNS as a Global Forwarding DNS server, so does it first check the Host record of the DNS server I forwarded, or does it go directly to another DNS regardless of whether there is a local record?