L: Our Certificates are made valid through the official seal and personal chop of the Commissioner.
L: Our Certificates are made valid through the official seal and personal chop of the Commissioner.
李：我们证明书是以盖公章和局长私人章方为有效。
L: Our Certificates are made valid through the official seal and personal chop of the Commissioner.
李：我们证明书是以盖公章和局长私人章方为有效。