1 to follow each other's accounts (on Weibo etc)

1 powdered milk

1 precious stone

2 gem

3 classifier: 枚 méi

4 classifier: 颗 kē

1 starch

2 amylum C6H10O

1 surname Shi

1 to kill two birds with one stone (idiom)

1 lit. the other mountain's stone can polish jade (idiom); to improve oneself by accepting criticism from outside

2 to borrow talent from abroad to develop the nation effectively

1 lit. to strike a stone with egg (idiom); to attempt the impossible

2 to invite disaster by overreaching oneself

1 solid as a boulder (idiom); absolutely secure

2 rock-firm and unyielding

1 as solid as rock (idiom); as sure as houses