Abstract: The disclosure discloses a formula of an anti-corrosion and anti-ultraviolet material, including: 10% to 20% of unsaturated polyester resin, 5% to 10% of styrene and polystyrene, 10% to 20% of glass fiber, 35% to 45% of rock powder and 3% to 5% of other reagent. A casing of an aerator may be made of the anti-corrosion and anti-ultraviolet material of the disclosure, so as to prevent the aerator from being corroded and affecting its normal work after it works underwater for a long time.

Abstract: Toothpaste and liquid enter a foam pump from a liquid inlet of the foam pump, and then a piston is driven by a telescopic motor to fully mix the toothpaste and the liquid in the foam pump. A bottom of the foam pump is connected to a top of the telescopic motor, a bottom of a connecting shaft is connected to a top of the foam pump, and a driving motor is sleeved on the connecting shaft via a first through hole. The mixed liquid may be used after flowing to a toothbrush head from a second through hole of the connecting shaft.

Abstract: Disclosed herein are methods, devices, and apparatuses, including computer programs stored on computer-readable media, for establishing communication between a first node and a second node in a blockchain system. One of the methods includes: the first node providing a node identifier of the first node to the second node and receiving a node identifier of the second node from the second node, to cause a first communication session to be established between the first node and the second node; the first node determining whether a second communication session exists between the first node and the second node; and in response to a determination that the second communication session exists between the first node and the second node, terminating one of the first communication session and the second communication session based on the node identifier of the first node and the node identifier of the second node.

Abstract: Implementations of this specification provide a system and method for performing transfer operations based on a blockchain smart contract. An example method includes: determining, by a transferor client device, a transferee account, a transfer amount, and at least one expense asset, and constructing and submitting a transfer transaction to a blockchain network. The transfer transaction is verified by the blockchain network through a smart contract, using a homomorphic encryption algorithm to determine that a sum of a transfer amount included in a transfer asset and a change amount included in a change asset is equal to a total expense amount corresponding to the at least one expense asset. Using the smart contract, the expense asset is deducted from a transferor account associated with the transferor client device, the change asset is added to the transferor account, and the transfer asset is added to the transferee account.

Abstract: Disclosed herein are methods, devices, and apparatuses, including computer programs stored on computer-readable media, for establishing communication between a first node and a second node in a blockchain system. One of the methods includes: the first node providing a node identifier of the first node to the second node and receiving a node identifier of the second node from the second node, to cause a first communication session to be established between the first node and the second node; the first node determining whether a second communication session exists between the first node and the second node; and in response to a determination that the second communication session exists between the first node and the second node, terminating one of the first communication session and the second communication session based on the node identifier of the first node and the node identifier of the second node.

Abstract: Disclosed herein are methods, devices, and apparatuses, including computer programs stored on computer-readable media, for establishing communication between a first node and a second node in a blockchain system. One of the methods includes: the first node providing a node identifier of the first node to the second node and receiving a node identifier of the second node from the second node, to cause a first communication session to be established between the first node and the second node; the first node determining whether a second communication session exists between the first node and the second node; and in response to a determination that the second communication session exists between the first node and the second node, terminating one of the first communication session and the second communication session based on the node identifier of the first node and the node identifier of the second node.

Abstract: Implementations of this specification provide a system and method for performing transfer operations based on a blockchain smart contract. An example method includes: determining, by a transferor client device, a transferee account, a transfer amount, and at least one expense asset, and constructing and submitting a transfer transaction to a blockchain network. The transfer transaction is verified by the blockchain network through a smart contract, using a homomorphic encryption algorithm to determine that a sum of a transfer amount included in a transfer asset and a change amount included in a change asset is equal to a total expense amount corresponding to the at least one expense asset. Using the smart contract, the expense asset is deducted from a transferor account associated with the transferor client device, the change asset is added to the transferor account, and the transfer asset is added to the transferee account.

Abstract: Disclosed herein are methods, devices, and apparatuses, including computer programs stored on computer-readable media, for establishing communication between a first node and a second node in a blockchain system. One of the methods includes: the first node providing a node identifier of the first node to the second node and receiving a node identifier of the second node from the second node, to cause a first communication session to be established between the first node and the second node; the first node determining whether a second communication session exists between the first node and the second node; and in response to a determination that the second communication session exists between the first node and the second node, terminating one of the first communication session and the second communication session based on the node identifier of the first node and the node identifier of the second node.

Abstract: Implementations of this specification provide a system and method for performing transfer operations based on a blockchain smart contract. An example method includes: determining, by a transferor client device, a transferee account, a transfer amount, and at least one expense asset, and constructing and submitting a transfer transaction to a blockchain network. The transfer transaction is verified by the blockchain network through a smart contract, using a homomorphic encryption algorithm to determine that a sum of a transfer amount included in a transfer asset and a change amount included in a change asset is equal to a total expense amount corresponding to the at least one expense asset. Using the smart contract, the expense asset is deducted from a transferor account associated with the transferor client device, the change asset is added to the transferor account, and the transfer asset is added to the transferee account.

Abstract: A second service component-oriented information entity sent by a first service component is sent to a second service component that processes the information entity, so that interaction between the service components based on the information entity is realized, and the association between the service components is also realized. A service component in an operating system can execute a specific function or provide a specific service. The function or service can be provided by the system or an application program. The information entity can transmitted among multiple service components to perform a function or service.