PTR [PETROCHINA CO] 6-K: (Original Filing)
[PETROCHINA COMPANY LIMITED 2017 SUSTAINABILITY REPORT 2017 SUSTAINABILITY REPORT ENERGIZE HARMONIZE REALIZE PetroChina Company Limited LOW-CARBON CONTENTS MATERIAL TOPICS 01 ABOUT US 02 MESSAGE FROM THE CHAIRMAN 04 INTERVIEW WITH THE PRESIDENT 06 INVESTOR FAQS 71 PERFORMANCE STATISTICS 77 OBJECTIVES]