Thanks Kay in helping an instant check in for my last minutes reservation. We collected the key from Kay's neighbor, Kay was so kind to come over and say hello in the next day and gave us some advice for transportation and security. The flat located in a quiet area just 5 mins walk from metro station and takes 20 mins reach to center. A number of Kebab restaurants near by open until midnight and the foods was good! The French restaurant that recommended by Kay was super good at reasonable price (Eur48 each includes a bottle of wine), which was unforgettable French food experience - the best French foods that we ever had!
At last, we appreciate Kay helped to file a report to CDG airport on behalf for my lost ring. People is not nice when you speak English in Paris............