Qintai Restaurant is a well-known catering brand, and its grade mainly depends on the level of dishes and services it provides.

According to what I understand, Qintai Restaurant is famous for its exquisite cooking techniques, high-quality ingredients and unique cuisine styles.

The dishes they create usually focus on the authenticity of the ingredients to meet customers' high requirements for gourmet food.

In addition, the service at Qintai Restaurant is also more attentive and thoughtful, and the waiters will provide professional services to make the dining experience more comfortable and enjoyable.

Overall, Qintai Restaurants belong to the high-end catering market and are of relatively high grade.