20 May is regarded as Valentine's Day on the Chinese webosphere as the pronunciation of '520' is similar to 'Wo Ai Ni' (I Love You). Last Saturday, more than 700 couples tied the knot officially in Chengdu, reported Sichuan Online and West China City Daily.
Sun Ai, who met her boyfriend online four years ago, was in a dilemma about choosing 20 May initially, because the Chinese almanac advised against getting married on that day.
Pang Qian, from Shaanxi province, had her customary wedding last month. She said she would wait till the Chinese Valentine's Day (七夕节, Qi Xi Jie) to register her marriage if she missed the auspicious date of 20 May.
The queue at Chengdu's Qingyang district's Civil Affairs Marriage Registry was more than ten meters long, by 10am, with the first couples streaming in at eight in the morning.
By 5pm, there were at least 30 divorces as tallied in the city centre's five districts and the Gaoxin district (High Tech Zone).
"If I knew there were going to be so many people registering their marriage today, I would have chose another day to get a divorce," lamented a divorcee at the Qingyang district bureau.
Another couple found the uncanny coincidence a good end for their relationship.
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