Fitch Ratings affirmed PetroChina's (SHA:601857, HKG:0857) long-term issuer default and senior unsecured ratings at A, with a stable outlook.
The ratings align with those of parent CNPC under the rating agency's consolidated approach, citing open legal ringfencing and access controls, according to a Tuesday research note.
Fitch assesses the Chinese government's responsibility to support CNPC as "very strong" given its full state ownership, energy security role and robust finances.