Reach-nativenpmstart start error!

  node.js, question

I followed the tutorial on RN website to play:
https://facebook.github.io/react-native/docs/getting-started.html#content
Seek to dispel doubts

The error message seen at the terminal during startup is as follows

/Users/yiwang/Documents/react_native/AwesomeProject/node_modules/react-native/local-cli/cli.js:56
const setupEnvScript = /^win/.test(process.platform)
^^^^^
SyntaxError: Use of const in strict mode.

at exports.runInThisContext (vm.js:73:16)
 at Module._compile (module.js:443:25)
 at Module._extensions..js (module.js:478:10)
 at Object.require.extensions.(anonymous function) [as .js] (/Users/yiwang/Documents/react_native/AwesomeProject/node_modules/react-native/node_modules/babel-core/lib/api/register/node.js:214:7)
 at Module.load (module.js:355:32)
 at Function.Module._load (module.js:310:12)
 at Module.require (module.js:365:17)
 at require (module.js:384:17)
 at Object.<anonymous> (/Users/yiwang/Documents/react_native/AwesomeProject/node_modules/react-native/cli.js:15:18)

Upgrade node above 4.1.