| 红 |
hóng wài xiàn | infrared ray |
| 红 |
Hóng | surname Hong |
| 红 |
gōng | used in 女红 |
| 红 |
hóng | red / popular / revolutionary / bonus |
| 红 |
hóng wài | infrared (ray) |
| 外 |
wài | outside / in addition / foreign / external |
| 外 |
wài xiàn | (military) line of troops encircling an enemy position / (telephony) outside line / (basketball) outside the three-point line |
| 线 |
xiàn | variant of 线 |
| 线 |
xiàn | thread / string / wire / line / CL:条,股,根 / (after a number) tier (unofficial ranking of a Chinese city) |