I am anxious to ask: can the actual controller be a foreign nationality? How to identify the joint controller when the shareholding ratio of the three shareholders of the company is similar?

How to determine that the shareholding ratio of the three shareholders of the company is similar * * * Ask the controller two questions: First, the controlling shareholder and actual controller of the company A to be listed have been emigrating and obtained foreign nationality about one year later. According to Decree No.6 of the Ministry of Commerce in 2009, shareholders cannot regard their shares as foreign shares when acquiring foreign nationality. So, does the case not constitute a substantial obstacle to the listing of the company at all? 2. Company B, the company to be listed, has three natural person shareholders, and the shareholding ratio of A, B and C is about 32%, 35% and 33%. Among them, A and C are brothers and sisters. So, should Party A, Party B and Party C be regarded as * * * joint controllers, or should Party A and Party C be regarded as * * * joint controllers? Is it necessary to sign a concerted action agreement? (I seem to have read in a book that three people are the same controller with similar shareholding ratio. ) Please give me some advice! Thank you! !