Abstract: The present invention relates to a multi-section barrel, fluid-propelled spinning ammunition, as well as a weapon system formed by them. The multi-section barrel adjusts the interaction between barrel and projectile through barrel shape to improve range and precision; the fluid propels the self-selected projectile to guide the fluid through and twist the projectile by arranging volute holes or volute grooves at the rear or tail of the projectile, so that the projectile forms spin through the action of the fluid without relying on rifling; the projectile can be used in combination with multi-section barrel, which can improve performance and reduce cost simultaneously.

Abstract: A cross-border payment and clearing system and a cross-border payment and clearing method that are based on the Internet and that do not depend on messages. The system and the method get rid of an existing clearing system based on messages, and high speed and low cost cross-border payment and clearing are implemented by means of communication without messages that is based on the Internet and counterparty transaction of members, and further, a trilateral clearing mode is implemented that ordinary corporations, natural persons, and the like directly submit a cross-border payment request to the clearing system, and the clearing system performs real-time payment and clearing according to a member of a payment corporate that is appointed by the clearing system or that is preferred, so that a large number of intermediate links and message transmission are omitted, and efficiency is greatly improved.