People's Broadcasting Station - Hulun Buir, transmitting from Hailar, Inner Mongolia (China), was logged on 7 February 2015. A Chinese language broadcast with commentary and news presented by female and male announcers was monitored from 22.50 till 23.10 UTC. Reception on 3.900 kHz was (SINPO) 24332 -- weak, but clear and audible, with peaks of audio.
Reception report was emailed to China Radio International on 11 February 2015. Ying Lian, at CRI, replied the following day with this email: "Thank you for your reception report. We will send you a QSL card. We hope you will tune in to our English program." The promised QSL card did indeed arrive on 17 March 2017. I know it is not a QSL from PBS Hulun Buir per se (owning to the difficulty to obtain it directly), but it is sufficient for my purpose.