BEGIN:VCALENDAR VERSION:2.0 PRODID:-//hacksw/handcal//NONSGML v1.0//EN TZ:+00 BEGIN:VEVENT DTSTART:20220131T000000Z DTEND:20220131T000000Z SUMMARY:International Petroleum and Petrochemical Technology Conference (IPPTC2022-Beijing) : Oral abstract deadline due before 31st January 2022 LOCATION:Beijing New China International Exhibition Center,Beijing,China END:VEVENT END:VCALENDAR