first:  Does that suggest diners avoid speaking much ? The same is true in the West . 
second:  No , absolutely not ! On the contrary , you'll be considered a well-connected , sociable man , if you keep involved in the conversation all the time . But always pay attention to what you say . If the table has a senior guest , say something as upbeat and cheerful as possible . Or maybe , you may give the floor to him and keep listening as if very interested . 