If you are referring to the external tanks then yes, they do still make sense on an LO platform, particularly one built for long range - you only need LO features once you arrive in the threat area. Given the size of the J-20 you can only presume that it can penetrate and recover over quite a long way. With an expanding AAR capability and artificial island airfields dotted around the area China will have capability over a massive stretch of the Pacific.
It is easy to pick apart the individual threads of China's rather unique military enhancements but taken as a whole their mix of long range anti-ship and anti-air missiles, a mesh of sonar nets and long-range radars plus airfields capable of hosting long-range LO aircraft, all on reclaimed islands, will give pause for thought for a CVN.
With no dedicated tanker aircraft (ignoring buddy / terminal tanking from SH) the strike reach of the USN is a relative weakness that China is able to exploit.