Here is I tracked back to the log of DCM4CHEE on Synology. Thanks.
2020-07-27 09:12:24,306 INFO [org.dcm4che3.net.Dimse] (EE-ManagedExecutorService-default-Thread-8) DCM4CHEE<-AURORA(80) >> 2:C-MOVE-RQ[pcid=203, prior=0
cuid=1.2.840.10008.5.1.4.1.2.1.2 - Patient Root Query/Retrieve Information Model - MOVE
tsuid=1.2.840.10008.1.2 - Implicit VR Little Endian
2020-07-27 09:12:24,306 INFO [org.dcm4chee.arc.retrieve.scp.CommonCMoveSCP] (EE-ManagedExecutorService-default-Thread-8) DCM4CHEE<-AURORA(80): Process C-MOVE RQ:
(0008,0052) CS [PATIENT] QueryRetrieveLevel
(0010,0020) LO [20190812101941] PatientID
2020-07-27 09:12:24,374 INFO [org.dcm4che3.net.Connection] (EE-ManagedExecutorService-default-Thread-8) Initiate connection from /
0.0.0.0:0 to localhost:105
2020-07-27 09:12:24,380 INFO [org.dcm4che3.net.Association] (EE-ManagedExecutorService-default-Thread-8) DCM4CHEE<-AURORA(80): processing 2:C-MOVE-RQ[pcid=203, prior=0
cuid=1.2.840.10008.5.1.4.1.2.1.2 - Patient Root Query/Retrieve Information Model - MOVE
tsuid=1.2.840.10008.1.2 - Implicit VR Little Endian failed. Caused by: : org.dcm4che3.net.service.DicomServiceException: java.net.ConnectException: Connection refused (Connection refused)
at org.dcm4chee.arc.store.scu.impl.CStoreSCUImpl.openAssociation(CStoreSCUImpl.java:83)
at org.dcm4chee.arc.store.scu.impl.CStoreSCUImpl.newRetrieveTaskMOVE(CStoreSCUImpl.java:124)
at org.dcm4chee.arc.store.scu.impl.CStoreSCUImpl$Proxy$_$$_WeldClientProxy.newRetrieveTaskMOVE(Unknown Source)
at org.dcm4chee.arc.retrieve.scp.CommonCMoveSCP.calculateMatches(CommonCMoveSCP.java:159)
at org.dcm4che3.net.service.BasicCMoveSCP.onDimseRQ(BasicCMoveSCP.java:66)
at org.dcm4che3.net.service.AbstractDicomService.onDimseRQ(AbstractDicomService.java:74)
at sun.reflect.GeneratedMethodAccessor723.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:38)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100)
at org.dcm4che3.net.service.DicomService$1781416349$Proxy$_$$_WeldClientProxy.onDimseRQ(Unknown Source)
at org.dcm4che3.net.service.DicomServiceRegistry.onDimseRQ(DicomServiceRegistry.java:86)
at org.dcm4che3.net.ApplicationEntity.onDimseRQ(ApplicationEntity.java:448)
at org.dcm4che3.net.Association.onDimseRQ(Association.java:696)
at org.dcm4che3.net.PDUDecoder.decodeDIMSE(PDUDecoder.java:459)
at org.dcm4che3.net.Association.handlePDataTF(Association.java:679)
at org.dcm4che3.net.State$4.onPDataTF(State.java:103)
at org.dcm4che3.net.Association.onPDataTF(Association.java:675)
at org.dcm4che3.net.PDUDecoder.nextPDU(PDUDecoder.java:177)
at org.dcm4che3.net.Association$2.run(Association.java:518)
at org.jboss.as.ee.concurrent.ControlPointUtils$ControlledRunnable.run(ControlPointUtils.java:105)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.glassfish.enterprise.concurrent.internal.ManagedFutureTask.run(ManagedFutureTask.java:141)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
at org.glassfish.enterprise.concurrent.ManagedThreadFactoryImpl$ManagedThread.run(ManagedThreadFactoryImpl.java:250)
at org.jboss.as.ee.concurrent.service.ElytronManagedThreadFactory$ElytronManagedThread.run(ElytronManagedThreadFactory.java:78)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.dcm4che3.net.Connection.connect(Connection.java:952)
at org.dcm4che3.net.ApplicationEntity.connect(ApplicationEntity.java:599)
at org.dcm4che3.net.ApplicationEntity.connect(ApplicationEntity.java:644)
at org.dcm4chee.arc.store.scu.impl.CStoreSCUImpl.openAssociation(CStoreSCUImpl.java:81)
... 29 more
2020-07-27 09:12:24,384 INFO [org.dcm4che3.net.Dimse] (EE-ManagedExecutorService-default-Thread-8) DCM4CHEE<-AURORA(80) << 2:C-MOVE-RSP[pcid=203, status=a702H, errorComment=java.net.ConnectException: Connection refused (Connection refuse
tsuid=1.2.840.10008.1.2 - Implicit VR Little Endian