Marital status	1) first marriage and residence	312	79.20%
	2) first marriage, Non-inhabited	62	15.70%
	3) remarriage	20	5.10%
Unit character	1) state-owned enterprises and institutions, civil servants	129	32.70%
	2) joint ventures, foreign companies	41	10.40%
	3) private enterprises, individual owners	151	38.30%
	4) farming	26	6.60%
	5) unemployed	47	11.90%
Child gender	1) boy	209	53.00%
Child gender	2) girl	185	47.00%
Child attitude towards two children	1) support	81	20.60%
	2) does not matter	243	61.70%
	3) against	70	17.80%
Number of elderly people	1) 1	18	4.60%
	2) 2	76	19.30%
	3) 3 and above	300	76.10%
Parental attitude towards two children	1) support	126	32.00%
	2) does not matter	230	58.40%
	3) against	38	9.60%
Two-child care	1) child’s grandparents	127	32.20%
	2) own	232	58.90%
	3) other people	35	8.90%
Number of brothers and sisters	1) none	57	14.50%
	2) 1	80	20.30%
	3) 2	142	36.00%
	4) 3 and above	115	29.20%
Father’s physical condition	1) very good	66	16.80%
	2) good	136	34.50%
	3) general and bad	192	48.70%
Mother’s physical condition	1) very good	64	16.20%
	2) good	129	32.70%
	3) general and bad	201	51.00%
Is there a housing?	1) Yes	292	74.10%
Is there a housing?	2) no	102	25.90%
Does the family have a loan?	1) Yes	203	51.50%
Does the family have a loan?	2) no	191	48.50%
Do you have five insurances and housing fund?	1) Yes	238	60.40%
Do you have five insurances and housing fund?	2) no	156	39.60%
Total annual household consumption (RMB yuan)	1) less than 50,000	147	37.30%
	2) 50,000 - 100,000	177	44.90%
	3) more than 100,000	70	17.80%
Whether parents provide financial support	1) yes	182	46.20%
Whether parents provide financial support	2) no	212	53.80%