In fact, you don't need to add contacts manually to WhatsApp.
事實上，您不用手動增加聯絡人到 WhatsApp中，
WhatsApp should import contacts stored in cell phone with automatically.
WhatsApp 會自動掃描手機上的連絡人清單。
The only thing you need to do is
您唯一要確定的是，
Step 1. make sure your contacts are stored on cell phone, not stored others place like SIM card.
確認您的聯絡人儲存於手機上，而不是SIM卡。
Step 2. refresh in WhatsApp. (This should be done with automatically)
在WhatsAPP更新。 (通常這步驟會自動處理)
