Les 5 blocages de base

                                                                                               Yi Lán                                                                       Er Lán

                                                                                   (blocage bas intérieur)                                         (blocage moyen extérieur)

                                                                                            San Lán                                                                         Seu Lán 

                                                                                 (blocage bas extérieur)                                                       (blocage Haut )

                                                                                                                                         Wu Lán

                                                                                                                            (blocage moyen intérieur)