How to book a free room for Dong Cheng's black gold card birthday?

Dongcheng Black Gold Card Birthday Free Room needs to be booked by calling customer service the day before the birthday.

Black gold card: the top interest rate is 498 yuan, 20% discount, free birthday room and all kinds of top privileges. Dongchenghui APP, adhering to the concept of "smart hotel, beautiful journey", is an efficient booking tool specially made for Dongchenghui iron powder.

Function introduction:

1. Hotel black technology, interactive new experience (what kind of experience is it to make booking a hotel as simple as taking a taxi).

2. Wisdom data, I know you best (if I don't have you in my heart, how can I break through myself again and again).

The accompanying secretary is heavily guarded.

4. Listen to your voice attentively (spare no effort to satisfy you).