All types of vessels should be standardized both in design and equipment. The old and wasteful types of inland water crafts and fishing boats should be replaced by modern efficient designs. The inland water crafts should be designed on the basis of certain standard draughts such as the 2-foot, 5-foot, and 10-foot classes. The fishing trawlers should be standardized into the one-day, the five-day, and the ten-day service class. The coastal transports should be standardized into the 2,000-, the 4,000-, and the 6,000-ton class, and for oversea transports we should have standardized ships of 12,000-, 24,000-, and 36,000-ton classes. Thus, the many thousands of inland water crafts and fishing junks that now ply the rivers, lakes, and coasts of China may be displaced by new and cheaper crafts of a few standard types which could perform better services at less expense. PROGRAM IV. In my first and third programs, I have described my plans for the Northwestern Railway System and the Southwestern Railway System. The former is for the purpose of relieving the congestion of population in the coast districts and the Yangtze Valley by opening up for colonization the vast unpopulated territory in Mongolia and Sinkiang, as well as of developing the Great Northern Port. The latter is for the purpose of exploiting the mineral resources of Southwestern China, as well as of developing the Great Southern Port--Canton. More railroads will be needed for the adequate development of the whole country. So in this fourth program, I shall deal entirely with railroads which will complete the 100,000 miles proposed in my introductory part of this International Development Scheme. The program will be as follows: I. The Central Railway System. II. The Southeastern Railway System. III. The Northeastern Railway System. IV. The Extension of the Northwestern Railway System. V. The Highland Railway System. VI. The Establishment of Locomotive and Car Factories. PART I The Central Railway System This will be the most important railway system in China. The area which it serves comprises all of China Proper north of the Yangtze and a part of Mongolia and Sinkiang. The economic nature of this vast region is that the southeastern part is densely populated while the northwestern part is thinly populated, and that the southeastern part possesses great mineral wealth while the northwestern part possesses great potential agricultural resources. So every line of this system will surely pay as the Peking-Mukden line has proved. With the Great Eastern Port and the Great Northern Port as termini of this system of railroads, I propose that, besides the existing and projected lines in this region, the following be constructed, all of which shall constitute the Central Railway System.