问题: 如何把共识节点降级为同步节点？
回答: 长安链把共识节点降级为同步节点，只需要在链上将该共识节点的nodeId删除。
删除共识节点nodeid的cmc命令参考


./cmc client chainconfig consensusnodeid remove \
--sdk-conf-path=./testdata/sdk_config.yml \
--org-id=wx-org1.chainmaker.org \
--user-tlscrt-file-path=./testdata/crypto-config/wx-org1.chainmaker.org/user/client1/client1.tls.crt \
--user-tlskey-file-path=./testdata/crypto-config/wx-org1.chainmaker.org/user/client1/client1.tls.key \
--user-signcrt-file-path=./testdata/crypto-config/wx-org1.chainmaker.org/user/client1/client1.sign.crt \
--user-signkey-file-path=./testdata/crypto-config/wx-org1.chainmaker.org/user/client1/client1.sign.key \
--admin-crt-file-paths=./testdata/crypto-config/wx-org1.chainmaker.org/user/admin1/admin1.sign.crt,./testdata/crypto-config/wx-org2.chainmaker.org/user/admin1/admin1.sign.crt,./testdata/crypto-config/wx-org3.chainmaker.org/user/admin1/admin1.sign.crt \
--admin-key-file-paths=./testdata/crypto-config/wx-org1.chainmaker.org/user/admin1/admin1.sign.key,./testdata/crypto-config/wx-org2.chainmaker.org/user/admin1/admin1.sign.key,./testdata/crypto-config/wx-org3.chainmaker.org/user/admin1/admin1.sign.key \
--node-id=QmcQHCuAXaFkbcsPUj7e37hXXfZ9DdN7bozseo5oX4qiC4 \
--node-org-id=wx-org1.chainmaker.org