Is it necessary to join the party building in the articles of association?

No need. Whether it is necessary to join the party building in the company's articles of association, because there is no provision on party organizations in the company law, but the provisions on establishing party organizations can be written into the company's articles of association. The company law cannot interfere with the party discipline in party constitution. Party member broke the law, so he should be regulated and bound by the law, so it doesn't matter whether the articles of association are written or not.