Analysis of information sources in references of the Wikipedia article "Chengdu J-20" in English language version.
China plans to have at least 500 to 700 J-20 fighter jet before 2035 to challenge USA's F-35.
[W]hile there remains some debate about how stealth China's J-20 truly is, it is still believed to be more difficult to detect than its Russian competition...The J-20's front canards were initially thought to be a detriment to the aircraft's stealth profile, but computer modeling would seem to suggest that the J-20 is likely extremely difficult to detect when approaching head-on and could further improve its stealth profile as the program matures.
{{cite web}}: CS1 maint: bot: original URL status unknown (link)[W]hile there remains some debate about how stealth China's J-20 truly is, it is still believed to be more difficult to detect than its Russian competition...The J-20's front canards were initially thought to be a detriment to the aircraft's stealth profile, but computer modeling would seem to suggest that the J-20 is likely extremely difficult to detect when approaching head-on and could further improve its stealth profile as the program matures.
China plans to have at least 500 to 700 J-20 fighter jet before 2035 to challenge USA's F-35.