Disclosed is a compound containing a pyridine ring that can be synthesized in an industrially advantageous manner, and is useful as an intermediate for producing tetrazolyloxime derivatives that exhibit fungicidal activity (wherein R0 represents a C1-6 alkoxy group, C1-6 alkoxy-C1-6 alkoxy group or the like, R1 represents a C1-2 alkoxycarbonyl group, acetyl group or the like, Z represents a halogen atom, cyano group or the like, X represents a halogen atom, and n represents an integer of 0 to 3), and industrially advantageous production methods for producing 2-substituted amino-6-halomethylpyridine derivatives and tetrazolyloxime derivatives.