.baidu is a generic top-level domain listed by IANA. Its IANA-designated manager is Baidu, Inc..
.baidu is a brand namespace; registrations are limited to its registry operator and qualifying affiliates or licensees
.baidu is a brand namespace; registrations are limited to its registry operator and qualifying affiliates or licensees. The comparison may still show observed renewal or transfer information for existing names.
Compare any listed renewal and transfer prices for an existing .baidu name. Those operations remain separate from the namespace’s restriction on new registrations; a historical registration tariff does not reopen registration.
Yes. The root delegation for .baidu has a published DS record. That is not evidence that a registrar can submit DS records for an individual domain.