Twitter

1. self-promotion

1.1. published own profile

1.1.1. skills

1.1.2. professional education

1.2. up-to-date information

1.2.1. tweet

2. Business Function

2.1. website introduction

2.1.1. customer awareness

2.2. Networking

2.2.1. targeted customers

2.2.2. partners

2.2.3. Investor

2.2.4. new friends

3. education

3.1. online learning

3.2. online book resource

3.3. study group

4. shared hobbies

4.1. great music

4.2. interesting video

4.3. Fun story and status

5. Tweet !

5.1. Location

5.2. nice tweets