1. The necklace will be returned to Wan Xiong and his wife. According to the General Principles of the Civil Law of People's Republic of China (PRC) and Article 12 of the Civil Law of People's Republic of China (PRC): "Minors over the age of 10 are persons with limited capacity for civil conduct and can engage in civil activities appropriate to their age and intelligence; Other civil activities are represented by their legal representatives or agreed by their legal representatives. " Judging from the meaning in the title, Wan Qi was under the age of 18 when she gave the gift, and she belongs to a person with limited capacity for civil conduct. Therefore, Wan Qi is not qualified to give a necklace, and her gift behavior is invalid. Therefore, the necklace should be returned to Wan Xiong and his wife.

Second, this award should be won by Qu. In this case, Liu Jian proposed to buy four lottery tickets, one for each person, and the other three also agreed. So the lottery ticket bought back belongs to the individual. After winning the prize, the prize money should also belong to the individual.

Third, you can't. According to Article 8 of the Marriage Law of the People's Republic of China: "When both men and women want to get married, they must register their marriage in the marriage registration office in person. Those who meet the requirements of this law shall be registered, issued a marriage certificate and received a marriage certificate, that is, the relationship between husband and wife shall be established. " In the case, A and her boyfriend just lived together, but the relationship between husband and wife was not established. Therefore, A can't sue her boyfriend for bigamy.

4. 1 shall be based on the actual time of death.

2. effective. After being declared dead, Zhao and others, as their wives and children, have legal inheritance rights, so the inheritance is valid.

3. effective. According to Article 24 of the General Principles of Civil Law of People's Republic of China (PRC): "The civil juristic act performed by a person with civil capacity during the period of being declared dead is valid." As a qualified civil subject, Liu Jinan's capacity for civil conduct still exists after being declared dead. Therefore, the will is valid.

As stated in the will, it will be distributed among four people. According to Article 16 of the Inheritance Law of People's Republic of China (PRC), "citizens can make a will and designate their personal property to be inherited by more than one legal heir." After his death, his relationship with Zhao was dissolved, but Zhao still had the right to inherit. Later, Liu Jin 'an and Hu Rou got married. Although there is no marriage formalities, the facts of the couple are clear. They have a son, Liu Dongdong. Therefore, Hu Rou, Zhao, Emperor Wu of Song and Dong Liu Dong are the legal heirs. Therefore, the will is valid and should be carried out according to the will.