users = {
    'user1': {
        'first': 'xiao',
        'last': 'ming',
        'location': 'shanghai'
    },
    'user2': {
        'first': 'hong',
        'last': 'hong',
        'location': 'beijing'
    },
}

for username, user_info in users.items():
    print('\nUsername: ' + username)
    full_name = user_info['first'] + ' ' + user_info['last']
    location = user_info['location']

    print('\t Full name: ' + full_name.title())
    print('\tLocation: ' + location.title())