Is there a difference between Nantong Longka and Yazi and self-touching?

Playing Nantong Dragon Card means that one card is played on the veteran and the other card is played on other cards. For example, the red flowers will be beaten, so the three red flowers in hand are sixty-four Hu, the one touched is sixteen Hu, and the three ones touched later are forty-eight Hu. The other three veterans started with sixty-four colors, touched eight colors, leveled thirty erhu, and then touched four colors. (5) "Qian Wen": The so-called "Qian Wen" is the C of "123", and one C of "123" is called single Qian Wen, two are called double Qian Wen, three are called triple Qian Wen, and so on. Single penny 20 Hu, double penny 50 Hu, three pence 100 Hu, and four pence have not been seen so far. Reference /ntcp.html