middle break
2.Owing to its Cenozoic tectonic migration from west to east and from south to west, it developed three types of play, one is the lower early break-early decline play in the Huimin sag, the second is the middle inheritable play in the Dongying sag, the third is the upper late break-late decline play in the Zhanhua and Chezhen sags.
3.Laws are generally found to be nets of such a texture, as the little creep through, the great break through, and the middle-sized are alone entangled in .
4.However, thanks to large scale of bank reinforcement and rehabilitation of damaged projects in the middle and down stream of the Yangtze River, compared with 1998, the dangerous situations reduced by 7,750 or 82%, severe dangers reduced by 587, or 84%, among which, piping and foundation break decreased by 1,737 and 296 respectively, or 86% and 90%.
5.Its buildings run north to south, and a walk street in the middle and retail markets at both sides; business and catering are mainly dealt on the 1st and 2nd floors, and small-sized guest rooms, business offices and apartments on the upper floors; the walk street, 17 m wide and 13m in part, with 4 entries and exits, set in the four directions of walk street, and it neighbors the port in the north, with game playing halls and other amusement facilities for tourists break and amusement when they wait in the port; business offices and small hotels in the west adopt the court-style, which small scattered pattern is not only convenient to isolate operation, but also to lighting and ventilation, vertical greening by bottom roof platform, office and accommodation environment and space level and commercial value improvement.

