Why are statistics on received and sent Hello messages both 0

Run the display mpls ldp interface command to check the interface status. The command output is displayed as follows:
display mpls ldp interface LDP Interface Information in Public Network
Codes:LAM(Label Advertisement Mode), IFName(Interface name)
A '*' before an interface means the entity is being deleted.
------------------------------------------------------------------------------
IFName Status LAM TransportAddress HelloSent/Rcv
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Vlanif10 Active DU 1.1.1.1 29574/29539
------------------------------------------------------------------------------
In normal cases, the interface status is Active. If the interface status is Inactive, the interface cannot receive or send Hello messages. In most cases, the interface status is Inactive because the interface is shut down or no IP address is configured for the interface.

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