Interesting photo from the Internet:
Original text:
"Chinese BK1850 main battle tank. Basically, it's WZ1224 brought to working condition. Funny that it had autoloader for 17 rounds, but it couldn't switch ammo type"
From this page
From the late 1980s to the mid-1990s, NORINCO advertised the modernization of Type 59 and Type 69 tanks using a thermal sleeve for a 100 mm rifled gun. Are there any images of a Chinese tank equipped with a gun with a thermal sleeve?