After replacing the chain of the hand chain hoist

· Is the chain twisted or knotted? Make sure the chain hangs naturally without twisting. · Are the connection points absolutely secure? Double-check connecting rings or connectors. · Is the length appropriate? The new chain length should be consistent with the old chain, or meet your work needs (customized lengths need to be handled by professionals). · Lubrication: Properly lubricate the new chain according to the manufacturer's instructions