Is it necessary for the misty rain rivers and lakes to brush their goodwill at the gossip gate?

It's not necessary. According to relevant public information, in the game "The Eight Diagrams Gate in the Cloudy Rain Rivers and Lakes", if the goodwill reaches 27,000, you can buy a Yin and Yang Feng Shui dish for Dong Sanchuan, knowing that it will be used in Huashan, but you have to find an old carpenter in Tai 'an Town to fix the Yin and Yang Feng Shui before you can use it. There is no need to fill it.