Npm installation error for nodejs

  node.js, question
C:\Users\zy109>npm install -g gulp
 npm ERR!  Windows_NT 10.0.10586
 npm ERR!  argv "D:\\Program\\nodejs\\node.exe" "D:\\Program\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "gulp"
 npm ERR!  node v4.4.0
 npm ERR!  npm  v2.14.20
 npm ERR!  code ECONNRESET
 npm ERR!  errno ECONNRESET
 npm ERR!  syscall read
 npm ERR!  network read ECONNRESET
 npm ERR!  network This is most likely not a problem with npm itself
 npm ERR!  network and is related to network connectivity.
 npm ERR!  network In most cases you are behind a proxy or have bad network settings.
 npm ERR!  network
 npm ERR!  network If you are behind a proxy, please make sure that the
 npm ERR!  network 'proxy' config is set properly.  See: 'npm help config'
 npm ERR!  Please include the following file with any support request:
 npm ERR!  C:\Users\zy109\npm-debug.log

This error occurred during installation, how to solve it? ? ?

Look for domestic sources, or add agents, your network problems