The test network where are how to communicate with other participants?
If you are asking for the address of the public testnet, it is located at http://testnet.bitshares.eu and documented at http://docs.bitshares.eu/testnet
I have compiled this program, but the network has been shut down?
3398925ms th_a witness.cpp:86 plugin_initialize ] witness plugin: plugin_initialize() begin
3398926ms th_a witness.cpp:96 plugin_initialize ] key_id_to_wif_pair: ["TEST6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV","5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3"]
3398926ms th_a witness.cpp:114 plugin_initialize ] witness plugin: plugin_initialize() end
3398926ms th_a object_database.cpp:91 open ] Opening object database from /home/xiangnian/Graphene/graphene-testnet/programs/witness_node/witness_node_data_dir/blockchain ...
3398946ms th_a object_database.cpp:97 open ] Done opening object database.
3398946ms th_a thread.cpp:95 thread ] name:ntp tid:140566381545216
3398946ms th_a thread.cpp:95 thread ] name:p2p tid:140566293640960
3398991ms th_a application.cpp:128 reset_p2p_node ] Adding seed node 46.101.188.80:11010
3398992ms th_a application.cpp:155 reset_p2p_node ] Configured p2p node to listen on 0.0.0.0:11010
3398993ms th_a application.cpp:205 reset_websocket_serv ] Configured websocket rpc to listen on 0.0.0.0:11011
3398993ms th_a witness.cpp:119 plugin_startup ] witness plugin: plugin_startup() begin
3398993ms th_a witness.cpp:136 plugin_startup ] No witnesses configured! Please add witness IDs and private keys to configuration.
3398994ms th_a witness.cpp:137 plugin_startup ] witness plugin: plugin_startup() end
3398994ms th_a main.cpp:176 main ] Started witness node on a chain with 0 blocks.
3398994ms th_a main.cpp:177 main ] Chain ID is 39f5e2ede1f8bc1a3a54a7914414e3779e33193f1f5693510e73cb7a87617447